Cold rolling processing device and method for stainless steel pipes

Abstract

The present application provides a cold rolling processing device and method for stainless steel pipes, which relates to the field of cold rolling of stainless steel pipes. It includes a cold rolling mill, a storage rack and an oil scraping mechanism. After the pipes are cold rolled by the cold rolling mill, they are stacked in the storage rack, and the pipes in the storage rack pass through the oil scraping mechanism in sequence; the oil scraping mechanism includes a base, a sleeve and a bracket arranged on the base. The pipe is placed on the bracket, the sleeve is horizontally arranged and the mouth of the sleeve faces the pipe; an oil scraping bolt is arranged in the sleeve, the outer wall of the oil scraping bolt fits with the inner wall of the sleeve, and an air pipe is arranged at the bottom of the sleeve. The gas transmission equipment transmits gas into the sleeve through the air pipe and pushes the oil scraping bolt to move towards the inside of the pipe. The present application has the effect of being able to quickly and conveniently scrape the cold rolling oil on the inner wall of the stainless steel pipe.

Description

Technical Field

[0001] This application relates to the field of cold rolling of stainless steel pipes, and in particular to a cold rolling processing device and method for stainless steel pipes. Background Art

[0002] Stainless steel pipes have the advantages of corrosion resistance, high temperature resistance, high pressure resistance, etc., and are widely used in fields such as petrochemical industry, offshore engineering, and aerospace. In addition, when the bending and torsional strength are the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts, engineering structures, furniture and kitchen utensils, etc.

[0003] At present, the cold rolling of stainless steel pipes is generally completed by a cold rolling mill. The pipe blank needs to move forward in a rolling manner, so that the pipe blank undergoes rolling deformation on the reducing and sizing sections of the mandrel, thereby realizing the rolling of the stainless steel pipe. Before rolling by the cold rolling mill, cold rolling oil needs to be coated on the inner and outer walls of the pipe blank to play a lubricating role and prevent excessive and deep scratches on the inner or outer wall of the pipe blank during the rolling process, and improve the finished product quality.

[0004] After rolling, the residual cold rolling oil on the inner wall of the stainless steel pipe is more difficult to remove than that on the outer wall of the stainless steel pipe. A scraping head needs to be placed at one end of the stainless steel pipe, and the scraping head is pushed out from the other end of the stainless steel pipe through a push rod to achieve oil scraping. However, this requires the length of the push rod to be greater than the length of the stainless steel pipe, resulting in an overly long overall length of the equipment, more occupied space, and more cumbersome overall operation. Summary of the Invention

[0005] In order to improve the problem of complex operation for removing cold rolling oil on the inner wall of the stainless steel pipe, this application provides a cold rolling processing device and method for stainless steel pipes.

[0006] In a first aspect, this application provides a cold rolling processing device for stainless steel pipes, adopting the following technical solution:

[0007] The cold rolling processing device for stainless steel pipes includes a cold rolling mill, a storage rack, and an oil scraping mechanism. The pipes are stacked in the storage rack after being cold rolled by the cold rolling mill, and the pipes in the storage rack sequentially pass through the oil scraping mechanism; the oil scraping mechanism includes a base, a sleeve and a bracket provided on the base. The pipe is placed on the bracket, the sleeve is horizontally arranged and the mouth of the sleeve faces the pipe; a scraping bolt is arranged in the sleeve, the outer wall of the scraping bolt fits with the inner wall of the sleeve, and an air pipe is arranged at the bottom of the sleeve. The gas transmission device conveys gas into the sleeve through the air pipe and pushes the scraping bolt to move towards the inside of the pipe.

[0008] By adopting the above technical solution, after the gas transmission equipment inputs high-pressure gas, the oil scraping plug will rush out of the sleeve at a high speed and enter the pipe from one end of the pipe, and then rush out of the other end of the pipe under the action of inertia. In this way, the oil scraping plug can scrape the cold rolling oil on the inner wall of the pipe to the outside of the pipe, without the need to use a too long push rod, occupying a small space, and the oil scraping operation of the oil scraping plug can be realized through a simple air blowing effect, with a simple structure, convenient operation and good oil scraping effect.

[0009] Optionally, a winding roller and a pulling rope are further provided outside the bottom of the sleeve. The winding roller is driven by a motor. One end of the pulling rope is wound around the winding roller, and the other end of the pulling rope is connected to one side end face of the oil scraping plug.

[0010] By adopting the above technical solution, before the gas transmission equipment conveys gas, the motor acts reversely to release the pulling rope. In this way, after the gas transmission equipment inputs high-pressure gas, the oil scraping plug can drive the pulling rope to generate displacement together and perform the oil scraping operation. After the oil scraping is completed, the motor rotates forward to wind the pulling rope back onto the winding roller, thereby pulling the oil scraping plug back into the sleeve. On the one hand, the oil scraping operation can be performed again to improve the oil scraping effect. On the other hand, the rapid recovery of the oil scraping plug can be realized, which is convenient for the oil scraping operation of the next pipe.

[0011] Optionally, the oil scraping mechanism further includes a limiting pipe. The sleeve, the pipe and the limiting pipe are arranged in sequence. The sleeve is movably arranged on a first support seat, and a first cylinder is arranged outside the first support seat. The first cylinder pushes the sleeve to move towards the pipe;

[0012] The limiting pipe is fixedly arranged on a second support seat. The limiting pipe includes an equal-diameter part and two variable-diameter parts that are communicated with each other. The two variable-diameter parts are symmetrically arranged on both sides of the equal-diameter part; the maximum inner diameter of the variable-diameter part is greater than the inner diameter of the pipe and less than the outer diameter of the pipe, and the inner diameters of the sleeve, the pipe and the equal-diameter part decrease in sequence.

[0013] By adopting the above technical solution, before oil scraping, the first cylinder operates to push the sleeve towards the pipe, and then push the whole sleeve and the pipe towards the limiting pipe. After the sleeve, the pipe and the limiting pipe come into contact and communicate with each other, the first cylinder stops operating. In this way, the sleeve, the pipe and the limiting pipe form an interconnected whole, thus improving the overall airtightness. The high-pressure gas input by the gas transmission equipment can push the oil scraping plug to generate a greater displacement, ensuring that the oil scraping plug can enter from one end of the pipe and move out from the other end of the pipe to complete the oil scraping operation. After the oil scraping plug enters the limiting pipe from the pipe, it will successively pass through a reduced-diameter part, an equal-diameter part and another reduced-diameter part. During this process, the cold rolling oil adhered to the surface of the oil scraping plug will be scraped off by the inner wall of the limiting pipe. In this way, after the motor winds the pulling rope to reset the oil scraping plug, the cold rolling oil on the surface of the oil scraping plug will not cause secondary pollution to the pipe.

[0014] Optionally, the oil scraping plug includes a sleeve, a sponge sleeve and a connecting rod. The sleeve and the connecting rod are connected by threads. The sponge sleeve wraps the sleeve, and the mouth of the sponge sleeve is flush with one end face of the sleeve. A pull ring is provided at one end face of the connecting rod located on one side of the sleeve, and the other end of the pulling rope is connected to the pull ring.

[0015] By adopting the above technical solution, after the sponge sleeve enters the pipe, it is in a compressed state and can better remove the cold rolling oil in the pipe. The connecting rod and the sleeve are detachably connected by threads, and the sleeve and the sponge sleeve are fixedly connected. In this way, after the sponge sleeve is damaged, it can be replaced in time and quickly, and the pulling rope and the connecting rod that do not directly play the role of oil scraping can be reused.

[0016] Optionally, a plurality of oil holes are provided at the bottom of the reduced-diameter part, and an oil storage tank is provided below the limiting pipe. The length of the oil storage tank is greater than the length of the limiting pipe.

[0017] By adopting the above technical solution, when the sponge sleeve moves from the pipe to the reduced-diameter part, the sponge sleeve will be in a natural fluffy state. After entering the equal-diameter part and another reduced-diameter part, the sponge sleeve changes from fluffy to tight and then from tight to fluffy. Then, during the process of the motor rotating forward and pulling the sponge sleeve to reset through the pulling rope, the sponge sleeve changes from fluffy to tight again and then enters the pipe from the fluffy state. In this way, multiple squeezing effects on the sponge sleeve are formed, which can reliably discharge the cold rolling oil adsorbed in the sponge sleeve and penetrate it into the oil storage tank through the oil holes, avoiding the cold rolling oil generated by scraping from flowing around and causing pollution or flowing back into the pipe again, and ensuring the effective oil scraping effect of the sponge sleeve on the inner wall of the pipe.

[0018] Optionally, a first magnet is provided between the bottom of the sponge sleeve and the other end face of the sleeve; a second cylinder is provided on the side of the limiting tube away from the pipe, and a second magnet is provided on the push rod of the second cylinder, and the first magnet and the second magnet are attracted to each other within the limiting tube.

[0019] By adopting the above technical solution, the traction effect on the sponge sleeve is realized by the magnetic adsorption of the first magnet and the second magnet, preventing the pipe from being too long and the gas input by the gas transmission equipment from being unable to drive the sponge sleeve to scrape through the pipe and pass through the limiting tube.

[0020] Optionally, chamfers are provided on both sides of the sponge sleeve, and the minimum outer diameter of the chamfer is smaller than the inner diameter of the pipe.

[0021] By adopting the above technical solution, during the process of the sponge sleeve penetrating into the pipe from the sleeve or from the limiting tube into the pipe, the chamfer can play a guiding role to prevent the sponge sleeve from being stuck between the pipe and the sleeve or between the pipe and the limiting tube.

[0022] Optionally, the maximum distance between the equal-diameter part and the pipe is smaller than the length of the oil scraping bolt.

[0023] By adopting the above technical solution, when the bottom of the sponge sleeve is displaced to the equal-diameter part, the mouth of the sponge sleeve is still inside the pipe. In this way, to the greatest extent, the air blowing effect of the gas transmission equipment on the sponge sleeve can drive the sponge sleeve to generate a sufficient displacement amount to ensure that the first magnet and the second magnet can be reliably attracted, thus ensuring that the cold rolling oil absorbed by the sponge sleeve can be extruded through the limiting tube.

[0024] Optionally, the bracket is in an arc shape that fits the pipe.

[0025] By adopting the above technical solution, while the bracket can support the pipe, it does not limit the horizontal movement of the pipe, so that after the first cylinder operates, the sleeve can push the pipe to displace and dock with the limiting tube to form a connected whole.

[0026] In a second aspect, the present application provides a cold rolling processing method for stainless steel pipes, adopting the following technical solution:

[0027] The cold rolling processing method for stainless steel pipes includes the following steps:

[0028] S1. Stack the pipes after cold rolling by the cold rolling mill in the storage rack for gravity oil control;

[0029] S2. Take a pipe from the storage rack and place it on the bracket, then the first cylinder operates to push the sleeve and the pipe, so that the limiting tube, the pipe and the sleeve are closely attached to each other;

[0030] S3. The gas transmission equipment transmits gas into the sleeve through the gas pipe. The motor rotates in the reverse direction, the pulling rope is released outward from the winding roller, and the oil scraping plug is blown from the sleeve into the pipe, and then enters the limiting pipe through the pipe;

[0031] S4. When the other end face of the oil scraping plug enters the equal-diameter part, the push rod of the second cylinder extends into the limiting pipe, and the first magnet attracts the second magnet;

[0032] S5. The push rod of the second cylinder retracts, pulling the oil scraping plug out of the limiting pipe;

[0033] S6. The motor rotates forward, releases the attraction between the first magnet and the second magnet, and pulls the oil scraping plug back into the sleeve;

[0034] S7. The first cylinder acts in the reverse direction, pulls the sleeve back to its original position, the oil removal of the pipe processing is completed, the pipe is taken out from the bracket and stored separately, and it is over.

[0035] By adopting the above technical solution, the gas input by the gas transmission equipment forms a gas blowing effect on the oil scraping plug, so that the oil scraping plug passes through the pipe and enters the limiting pipe. When the oil scraping plug is in the pipe, the sponge sleeve is in a tight state, which can reliably scrape the cold rolling oil on the inner wall of the pipe, and the sponge sleeve in the tight state has good airtightness, which can improve the distance blown by the gas; when the oil scraping plug passes through the limiting pipe from the pipe and then is pulled back from the limiting pipe to the pipe, the inner wall of the limiting pipe will remove the cold rolling oil on the surface of the oil scraping plug, preventing the oil scraping plug from causing secondary pollution to the inner wall of the pipe during the reset process.

[0036] To sum up, the present application includes the following beneficial effects:

[0037] 1. After the gas transmission equipment inputs high-pressure gas into the sleeve, the oil scraping plug will rush out of the sleeve at a high speed and move in a state of being attached to the inner wall of the pipe. In this way, the oil scraping plug can scrape the cold rolling oil on the inner wall of the pipe to the outside of the pipe, occupying a small overall space, being convenient to operate, and having a good oil scraping effect.

[0038] 2. By reasonably setting the inner diameters of the sleeve and the limiting pipe, it is ensured that the sponge sleeve of the oil scraping plug is in a compressed and tight state in both the sleeve and the pipe, which also ensures that the movement of the sponge sleeve in the pipe can achieve the scraping operation of the cold rolling oil on the inner wall of the pipe.

[0039] 3. Through the extrusion of the sponge sleeve in the limiting pipe, the removal operation of the cold rolling oil adsorbed by the sponge sleeve itself is realized, effectively preventing the cold rolling oil from being brought into the pipe again when the sponge sleeve is reset under the pulling action of the pulling rope, ensuring that the oil scraping operation is simple and effective. Brief Description of the Drawings

[0040] Figure 1 is a schematic perspective view of the present application;

[0041] Figure 2 is a schematic perspective view of the oil scraping mechanism;

[0042] Figure 3 is a schematic internal structure view of the oil scraping mechanism;

[0043] Figure 4 is a schematic perspective view of the oil scraping plug;

[0044] Figure 5 is a schematic internal structure view of the oil scraping plug;

[0045] Figure 6 is Figure 3 action state reference of Figure 1 ;

[0046] Figure 7 is a schematic internal structure view of the limit pipe;

[0047] Figure 8 is Figure 3 action state reference of Figure 2 ;

[0048] In the figure: 1, cold rolling mill; 2, storage rack; 3, oil scraping mechanism; 31, base; 32, sleeve; 321, air pipe; 322, winding roller; 323, pulling rope; 324, motor; 325, first support seat; 33, oil scraping plug; 331, sleeve; 332, sponge sleeve; 333, connecting rod; 3330, pull ring; 34, limit pipe; 341, second support seat; 342, equal-diameter part; 343, variable-diameter part; 3430, oil hole; 344, oil storage tank; 3441, drain pipe; 3442, gate valve; 35, first cylinder; 350, mounting rack; 36, first magnet; 37, second cylinder; 38, second magnet; 4, pipe; 40, bracket. Specific embodiments

[0049] The following further elaborates on this application in conjunction with the attached Figure 1-8 drawings.

[0050] This embodiment discloses a stainless steel pipe cold rolling processing device.

[0051] Figure 1 is a schematic perspective view of this application. Refer to Figure 1, The cold rolling processing device for stainless steel pipes includes a cold rolling mill 1, a storage rack 2, and an oil scraping mechanism 3. After the pipe 4 is coated with cold rolling oil, it is placed in the cold rolling mill 1 for cold rolling. After cold rolling, it is left standing on the storage rack 2 for natural oil control, and then taken out in sequence and placed on the oil scraping mechanism 3. An oil receiving tank can be provided at the bottom of the storage rack 2 to receive the cold rolling oil dripping during standing. In order to facilitate the flow of the cold rolling oil, the storage rack 2 can be inclined. During the process of putting the pipe 4 from the storage rack 2 into the support 40, a cloth or rubber ring can be used to quickly remove the oil from the outer wall of the pipe 4.

[0052] Figure 2 is a schematic perspective view of the oil scraping mechanism, Figure 3 is a schematic internal structure diagram of the oil scraping mechanism. See Figure 2 and Figure 3 , The oil scraping mechanism 3 includes a base 31. A first cylinder 35, a sleeve 32, a pipe 4, a limiting pipe 34, and a second cylinder 37 are sequentially arranged on the base 31. The first cylinder 35 and the second cylinder 37 are oppositely arranged and are both fixed on the mounting frame 350. The sleeve 32 is movably arranged on the first support seat 325. The pipe 4 is movably arranged on the arc-shaped support 40. The limiting pipe 34 is fixedly arranged on the second support seat 341. The first cylinder 35 pushes the sleeve 32 and the pipe 4 and docks with the limiting pipe 34 to form a connected whole. A second magnet 38 is provided on the push rod of the second cylinder 37. The push rod of the second cylinder 37, the limiting pipe 34, the pipe 4, and the sleeve 32 are coaxially arranged. The push rod of the first cylinder 35 is connected to the outer wall of the sleeve 32. When the push rod of the first cylinder 35 extends, it will push the sleeve 32 to move and drive the pipe 4 to move towards the limiting pipe 34 at the same time after contacting the pipe 4. Since the limiting pipe 34 is fixedly arranged, when the pipe 4 docks with the limiting pipe 34, the first cylinder 35 stops acting. An air passage that communicates with each other is formed among the sleeve 32, the pipe 4, and the limiting pipe 34. A sealing ring can be provided between the end face of the pipe 4 and the end face of the limiting pipe 34 and between the end face of the pipe 4 and the end face of the sleeve 32 to improve the airtightness of the air passage.

[0053] Figure 4 is a schematic perspective view of the oil scraping bolt, Figure 5 is a schematic internal structure diagram of the oil scraping bolt. See Figure 4 and Figure 5, the oil scraping mechanism 3 further includes an oil scraping bolt 33, a pull rope 323 and a gas transmission device. The oil scraping bolt 33 includes a sleeve 331, a sponge sleeve 332 and a connecting rod 333. The connecting rod 333 is screwed into the sleeve 331 through a thread. The inner wall of the sponge sleeve 332 adheres to the outer wall of the sleeve 331. Chamfers for facilitating the sliding of the sponge sleeve 332 are provided on both sides of the sponge sleeve 332. A pull ring 3330 is provided at the end face of the connecting rod 333. A first magnet 36 is provided between the bottom of the sponge sleeve 332 and the sleeve 331. The first magnet 36 and the second magnet 38 can attract each other in the horizontal direction. A motor 324 is fixedly provided on the outer side of the bottom of the sleeve 32. A winding roller 322 is provided on the output shaft of the motor 324. One end of the pull rope 323 is wound around the winding roller 322, and the other end of the pull rope 323 is connected to the pull ring 3330. An air pipe 321 is also inserted into the bottom of the sleeve 32. The gas transmission device inputs gas into the sleeve 32 through the air pipe 321, and the gas can push the oil scraping bolt 33.

[0054] Figure 6 is Figure 3 the action state reference Figure 1 . See Figure 6 , after placing the pipe 4 on the bracket 40 and the first cylinder 35 pushes the sleeve 32 and the pipe 4, the motor 324 rotates in the reverse direction, releases a part of the pull rope 323 from the winding roller 322, and then the gas transmission device operates to input high-pressure gas into the sleeve 32 through the air pipe 321. At this time, the sponge sleeve 332 is in a tight state inside the sleeve 32. Only a small amount of gas will flow out from the gaps of the sponge sleeve 332 after entering the sleeve 32, and most of the gas will stay between the sponge sleeve 332 and the sleeve 32, thereby increasing the air pressure between the sponge sleeve 332 and the sleeve 32. The sponge sleeve 332 will move and rush into the pipe 4 at a relatively fast speed. At this time, the sponge sleeve 332 is still in a tight state. The movement of the sponge sleeve 332 will scrape off the cold rolling oil on the inner wall of the pipe 4 and push it to the outside of the pipe 4. When the sponge sleeve 332 completely enters the limit pipe 34, the oil scraping operation on the pipe 4 is completed. The motor 324 rotates in the forward direction, causing the pull rope 323 to wind around the winding roller 322, thereby pulling the sponge sleeve 332 back into the sleeve 32. The push rod of the first cylinder 35 retracts, and the sleeve 32 resets, and then the pipe 4 after the oil scraping can be taken out.

[0055] Figure 7 is the schematic diagram of the internal structure of the limit pipe. See Figure 7, the limiting tube 34 includes an equal-diameter portion 342 and two variable-diameter portions 343 that are interconnected. The two variable-diameter portions 343 are symmetrically disposed on both sides of the equal-diameter portion 342; the maximum inner diameter of the variable-diameter portion 343 is greater than the inner diameter of the pipe 4 and less than the outer diameter of the pipe 4. The inner diameter of the sleeve 32, the inner diameter of the pipe 4, and the inner diameter of the equal-diameter portion 342 decrease in sequence, so as to ensure that the tightness of the sponge sleeve 332 in the sleeve 32, the pipe 4, and the limiting tube 34 gradually increases, ensuring a reliable oil scraping effect; the outer diameter of the sponge sleeve 332 is greater than the inner diameter of the sleeve 32, the outer diameter of the sleeve 331 is less than the inner diameter of the equal-diameter portion 342, and the maximum distance between the equal-diameter portion 342 and the pipe 4 is less than the length of the oil scraping bolt 33. When the sponge sleeve 332 moves from the sleeve 32 into the pipe 4, the tightness of the sponge sleeve 332 increases. While improving the airtightness, the extrusion force of the sponge sleeve 332 on the inner wall of the pipe 4 is increased, thereby increasing the friction force between the outer wall of the sponge sleeve 332 and the inner wall of the pipe 4. In this way, the movement of the sponge sleeve 332 in the pipe 4 can effectively scrape the cold rolling oil adhering to the inner wall of the pipe 4; when the bottom of the sponge sleeve 332 is displaced to the variable-diameter portion 343, the sponge sleeve 332 becomes fluffy and can reliably absorb the cold rolling oil at the pipe orifice of the pipe 4. Then the sponge sleeve 332 continues to move. When the bottom of the sponge sleeve 332 is located at the equal-diameter portion 342, the mouth of the sponge sleeve 332 is still located in the pipe 4. In this way, it is ensured that before the first magnet 36 and the second magnet 38 are attracted, the sponge sleeve 332 can generate a sufficient amount of displacement.

[0056] Figure 8 Yes Figure 3 Action state reference Figure 2 . See Figure 8 , when the push rod of the second cylinder 37 extends and the first magnet 36 and the second magnet 38 are attracted, under the action of gas pushing and the pulling of the second cylinder 37, the sponge sleeve 332 is displaced from one variable-diameter portion 343 to another variable-diameter portion 343. During this process, the sponge sleeve 332 will change from a fluffy state to a tight state, and then from a tight state to a fluffy state. Through the change of the state of the sponge sleeve 332, the cold rolling oil adsorbed by the sponge sleeve 332 at the pipe orifice of the pipe 4 can be completely extruded and discharged to the outside of the limiting tube 34. In this way, during the process of the motor 324 winding the pull rope 323 and driving the sponge sleeve 332 to reset, the sponge sleeve 332 will not cause secondary pollution to the inner wall of the pipe 4. The overall structure is delicate, occupies a small space, and can effectively scrape the cold rolling oil on the inner wall of the pipe 4.

[0057] Below the limiting pipe 34, there is an oil storage tank 344. The length of the oil storage tank 344 is greater than that of the limiting pipe 34. A number of oil holes 3430 are provided at the bottom of each of the two reduced-diameter parts 343. The cold rolling oil scraped from the pipe 4 drips into the oil storage tank 344 through the oil holes 3430. During the process that the sponge sleeve 332 enters the equal-diameter part 342 from one reduced-diameter part 343 in the forward direction and enters the equal-diameter part 342 from the other reduced-diameter part 343 in the reverse direction, extrusion will occur between the inner wall of the sponge sleeve 332 and the inner wall of the limiting pipe 34, thereby discharging the cold rolling oil adsorbed by the sponge sleeve 332, and the discharged cold rolling oil drips into the oil storage tank 344 through the oil holes 3430. Since the reduced-diameter part 343 is in an inclined state, it can promote the flow of the cold rolling oil into the oil holes 3430 and will not be adsorbed by the sponge sleeve 332 again. A drain pipe 3441 is further provided on the outer wall of the oil storage tank 344, and a gate valve 3442 is provided on the drain pipe 3441. When the stock of the cold rolling oil in the oil storage tank 344 is relatively high, the gate valve 3442 can be opened to discharge the cold rolling oil through the drain pipe 3441.

[0058] This embodiment also discloses a cold rolling processing method for stainless steel pipes.

[0059] The cold rolling processing method for stainless steel pipes includes the following steps:

[0060] S1. Stack the pipes 4 after cold rolling by the cold rolling machine 1 in an inclined state in the storage rack 2 for gravity oil control, and place an oil collecting tank at the bottom of the storage rack 2 to collect the cold rolling oil dripping during the gravity oil control process.

[0061] S2. Take a pipe 4 from the storage rack 2 and place it on the support 40. Then, the first cylinder 35 acts to push the sleeve 32 and the pipe 4. After touching the limiting pipe 34, the limiting pipe 34, the pipe 4 and the sleeve 32 are closely attached to each other to form an air passage.

[0062] S3. The gas transmission device inputs gas into the sleeve 32 through the air pipe 321. At the same time, the motor 324 rotates in the reverse direction, and the pull rope 323 is released outward from the winding roller 322 to provide a margin for the movement of the oil scraping plug 33. The sponge sleeve 332 of the oil scraping plug 33 is always in a tight state in the sleeve 32 and the pipe 4, and is blown from the sleeve 32 into the pipe 4. During the movement in the pipe 4, the cold rolling oil on the inner wall of the pipe 4 is scraped off, and then enters the limiting pipe 34 through the pipe 4, completing the removal operation of the cold rolling oil adsorbed in the sponge sleeve 332, and preventing the sponge sleeve 332 from causing secondary pollution to the pipe 4 during the reset process.

[0063] S4. When the other end face of the oil scraping plug 33 enters the equal-diameter part 342, the push rod of the second cylinder 37 extends into the limiting pipe 34, and the first magnet 36 is attracted to the second magnet 38, so that the sponge sleeve 332 can be driven by the second cylinder 37.

[0064] S5. The push rod of the second cylinder 37 retracts. Under the combined action of the gas driving force input by the gas transmission device, a long-distance displacement of the sponge sleeve 332 is achieved, so that the sponge sleeve 332 of the oil scraping bolt 33 penetrates from one reduced-diameter part 343 into the equal-diameter part 342 with an inner diameter smaller than the inner diameter of the pipe 4, then penetrates from the equal-diameter part 342 into another reduced-diameter part 343, and finally completely disengages from the limit pipe 34 and has no contact with the inner wall of the limit pipe 34. As a result, both the cold rolling oil scraped from the inner wall of the pipe 4 by the sponge sleeve 332 and the cold rolling oil extruded due to interference with the equal-diameter part 342 are discharged into the oil storage tank 344 through the oil holes 3430. While the cold rolling oil on the inner wall of the pipe 4 can be quickly removed, it also avoids the pollution of the inner wall of the pipe 4 caused by the reset of the sponge sleeve 332;

[0065] S6. The motor 324 rotates forward, the second cylinder 37 remains stationary, the attraction between the first magnet 36 and the second magnet 38 is released, and the oil scraping bolt 33 is pulled back into the sleeve 32 by continuously winding the pull rope 323 around the winding roller 322 to realize the reset of the sponge sleeve 332;

[0066] S7. The first cylinder 35 acts in the reverse direction to pull the sleeve 32 back to its original position. The oil removal of the pipe 4 is completed, and the pipe 4 is taken out from the bracket 40 and stored separately. It's done.

[0067] By adopting the above steps, the cold rolling oil on the inner wall of the pipe 4 can be quickly and effectively scraped off. Moreover, the overall structure of the oil scraping mechanism 3 is delicate, occupies a small space, and has a high degree of automation in operation, which can effectively improve the oil scraping efficiency and the oil scraping effect.

[0068] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A cold rolling processing device for stainless steel pipes, characterized in that, It includes a cold rolling mill (1), a storage rack (2) and an oil scraping mechanism (3). After being cold rolled by the cold rolling mill (1), the pipes (4) are stacked in the storage rack (2), and the pipes (4) in the storage rack (2) pass through the oil scraping mechanism (3) in sequence; The oil scraping mechanism (3) includes a base (31), a sleeve (32) and a bracket (40) provided on the base (31). The pipe (4) is placed on the bracket (40), the sleeve (32) is horizontally arranged and the mouth of the sleeve (32) faces the pipe (4); An oil scraping bolt (33) is arranged in the sleeve (32). The outer wall of the oil scraping bolt (33) fits with the inner wall of the sleeve (32). An air pipe (321) is arranged at the bottom of the sleeve (32). An air conveying device inputs gas into the sleeve (32) through the air pipe (321) and pushes the oil scraping bolt (33) to move towards the inside of the pipe (4); A winding roller (322) and a pulling rope (323) are further arranged outside the bottom of the sleeve (32). The winding roller (322) is driven by a motor (324). One end of the pulling rope (323) is wound around the winding roller (322), and the other end of the pulling rope (323) is connected to one side end face of the oil scraping bolt (33); The oil scraping mechanism (3) further includes a limiting pipe (34). The sleeve (32), the pipe (4) and the limiting pipe (34) are arranged in sequence. The sleeve (32) is movably arranged on a first support seat (325). A first air cylinder (35) is arranged outside the first support seat (325). The first air cylinder (35) pushes the sleeve (32) to move towards the pipe (4); The limiting pipe (34) is fixedly arranged on a second support seat (341). The limiting pipe (34) includes an equal-diameter part (342) and two variable-diameter parts (343) that are communicated with each other. The two variable-diameter parts (343) are symmetrically arranged on both sides of the equal-diameter part (342); the maximum inner diameter of the variable-diameter part (343) is greater than the inner diameter of the pipe (4) and less than the outer diameter of the pipe (4). The inner diameter of the sleeve (32), the inner diameter of the pipe (4) and the inner diameter of the equal-diameter part (342) decrease in sequence.

2. The cold rolling processing device for stainless steel pipes according to claim 1, wherein The oil scraping bolt (33) includes a sleeve (331), a sponge sleeve (332) and a connecting rod (333). The sleeve (331) and the connecting rod (333) are connected by threads. The sponge sleeve (332) wraps the sleeve (331), and the mouth of the sponge sleeve (332) is flush with one side end face of the sleeve (331); A pull ring (3330) is arranged at one side end face of the connecting rod (333) located at the sleeve (331). The other end of the pulling rope (323) is connected to the pull ring (3330).

3. The cold rolling processing device for stainless steel pipes according to claim 1, characterized in that, A plurality of oil holes (3430) are arranged at the bottom of the variable-diameter part (343). An oil storage tank (344) is arranged below the limiting pipe (34). The length of the oil storage tank (344) is greater than the length of the limiting pipe (34).

4. The cold rolling processing device for stainless steel pipes according to claim 2, characterized in that, A first magnet (36) is arranged between the bottom of the sponge sleeve (332) and the other side end face of the sleeve (331); On the side of the limiting tube (34) away from the pipe material (4), a second cylinder (37) is provided. A second magnet (38) is provided on the push rod of the second cylinder (37). The first magnet (36) and the second magnet (38) are attracted to each other within the limiting tube (34).

5. The cold rolling processing device for stainless steel pipes according to claim 2, wherein, Both sides of the sponge sleeve (332) are provided with chamfers, and the minimum outer diameter of the chamfers is smaller than the inner diameter of the pipe material (4).

6. The cold rolling processing device for stainless steel pipes according to claim 4, characterized in that, The maximum distance between the equal-diameter part (342) and the pipe material (4) is smaller than the length of the oil scraping plug (33).

7. The cold rolling processing device for stainless steel pipes according to claim 1, characterized in that, The bracket (40) is in an arc shape that fits closely with the pipe material (4).

8. A stainless steel pipe cold rolling processing method using the stainless steel pipe cold rolling processing device according to any one of claims 1-7, characterized in that, It includes the following steps: S1. Stack the pipe materials (4) cold-rolled by the cold rolling mill (1) in the storage rack (2) for gravity oil control; S2. Take a pipe material (4) from the storage rack (2) and place it on the bracket (40). Then, the first cylinder (35) acts to push the sleeve (32) and the pipe material (4) so that the limiting tube (34), the pipe material (4), and the sleeve (32) are closely attached to each other; S3. The gas transmission equipment conveys gas into the sleeve (32) through the air pipe (321). The motor (324) rotates in the reverse direction, and the pull rope (323) is released outward from the winding roller (322). The oil scraping plug (33) is blown from the sleeve (32) into the pipe material (4), and then enters the limiting tube (34) through the pipe material (4); S4. When the other end face of the oil scraping plug (33) enters the equal-diameter part (342), the push rod of the second cylinder (37) extends into the limiting tube (34), and the first magnet (36) and the second magnet (38) are attracted to each other; S5. The push rod of the second cylinder (37) retracts, pulling the oil scraping plug (33) out of the limiting tube (34); S6. The motor (324) rotates in the forward direction to release the attraction between the first magnet (36) and the second magnet (38), and pulls the oil scraping plug (33) back into the sleeve (32); S7. The first cylinder (35) acts in the reverse direction to pull the sleeve (32) back to its original position. The oil removal of the pipe material (4) is completed. Take out the pipe material (4) from the bracket (40) and store it separately. Finish.

Images