Cold drawn pipe port grinding device and method

Abstract

The invention discloses a cold drawn pipe port grinding device and method, and particularly relates to the technical field of grinding device.The cold drawn pipe port grinding device comprises a clamping assembly used for fixing a cold drawn pipe, a hollow adjusting head is arranged on one side of the clamping assembly, a grinding assembly is arranged on the outer side of the hollow adjusting head, and the grinding assembly comprises a plurality of fixing blocks located on the outer side of the hollow adjusting head; an electric push rod is arranged on the fixing block, a U-shaped plate is fixedly arranged at the front end of the electric push rod, a grinding belt is arranged in the U-shaped plate, and fixing pieces are fixedly arranged at the two ends of the grinding belt. According to the device, the electric push rods contract, so that the rough grinding belt is far away from the cold-drawn pipe, the other electric push rod is controlled to extend, the other finer grinding belt is pushed to conduct grinding work, in this way, the operation of replacing the grinding belt can be completed on the premise that the grinding process is not interrupted, the grinding efficiency is ensured, and the device is more convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding devices, and particularly relates to a cold-drawn pipe port grinding device and method. Background Art

[0002] A cold-drawn pipe is a seamless steel pipe manufactured through a cold working process, having high dimensional accuracy and surface finish. This cold-drawing process improves the accuracy of the outer diameter and inner diameter and enhances the surface quality while maintaining a consistent wall thickness.

[0003] During actual use, a cold-drawn pipe needs to be cut according to usage requirements. After cutting, the port will inevitably have curled edges and burrs, and at this time, the port needs to be ground to facilitate subsequent use, such as a hardware pipe port grinding device with a publication number of CN221517202U in the prior art.

[0004] Common grinding tools in the prior art include sandpaper, sand belts, grinding wheels, and grinding discs, etc., such as a metal pipe port grinding device with a publication number of CN221111054U. These grinding tools have different coarseness levels, and the purpose of grinding the cold-drawn pipe port is to eliminate curled edges and burrs and make the port smoother on this basis; To this end, a relatively rough grinding tool can be used first to initially grind the port flat and then replace it with a finer grinding tool, so that the port is smoother on the basis of being flat. However, the process of replacing the grinding tool and the timing of replacing the grinding tool both need to be judged manually and the grinding process needs to be interrupted, which is difficult to achieve during the automatic grinding process. Summary of the Invention

[0005] The purpose of the present invention is to provide a cold-drawn pipe port grinding device and method. By retracting the electric push rod, the grinding belt is controlled to approach or move away from the cold-drawn pipe. This method can complete the operation of replacing the grinding belt without interrupting the grinding process, ensuring the grinding efficiency and being more convenient.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A cold-drawn pipe port grinding device includes a clamping assembly for fixing the cold-drawn pipe. A hollow adjusting head is provided on one side of the clamping assembly, and a grinding assembly is provided on the outer side of the hollow adjusting head; The grinding assembly includes a plurality of fixing blocks located on the outer side of the hollow adjusting head. An electric push rod is provided on the fixing block, and a U-shaped plate is fixedly provided at the front end of the electric push rod. The telescoping of the electric push rod can control the front and rear position of the U-shaped plate; A grinding belt is provided inside the U-shaped plate. Fixing pieces are fixedly provided at both ends of the grinding belt, and the fixing pieces are installed on the inner wall of the U-shaped plate through bolts. The U-shaped plate can be clamped at the port of the cold-drawn pipe, and the coarseness levels of the respective grinding belts are different.

[0007] Furthermore, an adjusting screw rod is rotatably connected to the inner wall of the hollow adjusting head. Two adjusting blocks are sleeved on the outer end of the adjusting screw rod through threads. After the adjusting screw rod rotates, the moving directions of the two adjusting blocks are opposite. A plurality of convex blocks are fixedly arranged at the outer ends of the adjusting blocks. A closing plate is arranged at the front end of the hollow adjusting head through bolts. The front end of the adjusting screw rod extends to the front side of the closing plate and is fixedly provided with a hand wheel; Two groups of sliding grooves are arranged at the outer end of the hollow adjusting head. The two groups of sliding grooves correspond to the two adjusting blocks respectively. The number of each group of sliding grooves is multiple. The sliding grooves correspond to the convex blocks one by one. The convex blocks are embedded into the corresponding sliding grooves. Two support arms are hinged to the side of the fixed block facing the hollow adjusting head. One ends of the two support arms are respectively hinged to the convex blocks at the outer ends of the two adjusting blocks. The number of the convex blocks at the outer end of each adjusting block is equal to and corresponds to the number of the fixed blocks one by one.

[0008] Furthermore, a base is arranged at the bottom of the clamping assembly. A linear motor is fixedly arranged at the top end of the base. A support platform is fixedly arranged at the top end of the mover of the linear motor. An end plate is arranged at the top end of the support platform; A driving shaft is fixedly arranged at the rear end of the hollow adjusting head. An electric slip ring is sleeved on the outer end of the driving shaft. The circuit for controlling the electric push rod is connected to the electric slip ring to supply power to the electric push rod while not affecting the rotation of the driving shaft. The rear end of the driving shaft is rotatably connected to the end plate. A motor for driving the driving shaft to rotate is fixedly arranged at the top end of the end plate. The rear end of the driving shaft penetrates through the end plate. The rear end of the driving shaft is in belt transmission with the output shaft of the motor.

[0009] Furthermore, a dust suction assembly is arranged at one end of the support platform facing the cold-drawn tube. The dust suction assembly includes a collecting tube arranged on the support platform. Exhaust fans are arranged on both sides of the collecting tube. The exhaust fans can extract the air in the collecting tube. One end of the collecting tube is sleeved with a sleeve; An air inlet is arranged at the top end of the sleeve. A filter bag is arranged on the inner wall of the sleeve. The open end of the filter bag is arranged in the sleeve. The main part of the filter bag is located in the collecting tube.

[0010] Furthermore, a column is fixedly arranged at the top end of the base. A controller electrically connected to the electric push rod is fixedly arranged at the top end of the column. The electric push rod is arranged at the output end of the controller. The controller can also be connected to a computer through a network to display relevant data and control the grinding device through the computer and the controller; The clamping assembly includes an outer clamping tube rotatably connected to one side of the column facing the grinding assembly. A plurality of dividing grooves are arranged at the outer end of the outer clamping tube. A plurality of clamping bolts are arranged on the outer end of the outer clamping tube through threads.

[0011] Further, a plurality of inclined blocks are fixedly arranged at the outer end of the outer clamping tube, and each inclined block is located between two adjacent partition grooves. A sliding sleeve is sleeved on the outer end of the outer clamping tube, and hydraulic cylinders are arranged on both sides of the sliding sleeve. The rear end of the hydraulic cylinder is fixedly connected to the column. The motor, the exhaust fan, the linear motor and the hydraulic cylinder are all arranged at the output end of the controller; A pressing plate is fixedly arranged at the bottom end of the outer clamping tube. An installation bracket is arranged at the outer end of the column. Pressure sensors are fixedly arranged on the inner walls of both sides of the installation bracket. The bottom end of the pressing plate extends into the installation bracket. The two pressure sensors are respectively located on both sides of the pressing plate. The pressure sensors are arranged at the input end of the controller.

[0012] Further, a central tube is fixedly arranged on the inner wall of the outer clamping tube. A support airbag is fixedly arranged at the outer end of the central tube. A plurality of ventilation holes are formed in the outer end of the central tube, and the ventilation holes are located in the support airbag. The support airbag is located inside the cold-drawn tube, and the outer clamping tube is sleeved on the outer end of the cold-drawn tube; A baffle is fixedly arranged at the outer end of the central tube. The rear end of the cold-drawn tube is in contact with the baffle. A gas guide pipe with a valve is fixedly arranged at the outer end of the central tube. The top end of the gas guide pipe extends to the top of the outer clamping tube, and the gas guide pipe is located behind the baffle.

[0013] The present invention further includes a method for polishing the port of the cold-drawn tube by the polishing device, and the specific steps are as follows: Step 1: Fix the cold-drawn tube to be polished on the clamping assembly. One end to be polished is located outside the clamping assembly and faces the polishing assembly. When fixing, insert the end of the cold-drawn tube that does not need to be polished into the outer clamping tube and abut it against the baffle. The central tube and the support airbag are inserted into the cold-drawn tube. Inflate the inside of the central tube through the gas guide pipe. The support airbag expands due to inflation and supports inside the cold-drawn tube. Then, push the sliding sleeve to move through the hydraulic cylinder. Therefore, the extrusion of the inclined block causes the outer clamping tube to tighten, and the clamping bolt clamps on the outer end of the cold-drawn tube accordingly, so as to fix the cold-drawn tube from the outer end. The clamping bolt can be rotated and adjusted to be applicable to cold-drawn tubes with different diameters; Step 2: After the cold-drawn tube is fixed, adjust the polishing assembly according to the diameter of the cold-drawn tube. Then, drive the support table and the polishing assembly to move by using the linear motor, move the polishing assembly close to the cold-drawn tube, and finally clamp the U-shaped plate at the port of the cold-drawn tube to be polished. When adjusting, drive the adjusting screw rod by rotating the handwheel. Under the action of the thread, the convex block moves along the adjusting screw rod, and the two approach or move away from each other. When approaching, the convex block pushes the support arm, causing the fixed block to move away from the cold-drawn tube. When moving away, the convex block pulls the support arm, and the fixed block approaches the cold-drawn tube; Step 3: After fixing the position of the grinding assembly, turn on the motor and use the motor to drive the grinding assembly to rotate to grind the cold-drawn tube. While grinding, use the dust suction assembly to suck and collect the debris generated during the grinding process. During grinding, the motor drives the drive shaft to rotate, which in turn drives the hollow adjusting head and the grinding assembly. During grinding, the electric push rod pushes the U-shaped plate closer to the cold-drawn tube, so that the grinding belt in the U-shaped plate is in close contact with the port of the cold-drawn tube. While in contact, as the grinding assembly rotates, the grinding belt rubs against the port of the cold-drawn tube, thus playing a role in grinding; Step 4: During grinding, the roughest grinding belt first performs the grinding work. The grinding belt performing the grinding work is in contact with the cold-drawn tube, and the other grinding belts are not in contact with the port of the cold-drawn tube. During the grinding process, according to the order from rough to fine, each grinding belt is replaced in turn for grinding until all the grinding belts have been ground, then the grinding work is completed. The port of the cold-drawn tube is rough before grinding and becomes smoother as the grinding progresses. Therefore, during the grinding process of each grinding belt, the grinding resistance is first large and then small. The cold-drawn tube is fixed on the clamping assembly, and the reaction force of the grinding resistance will cause the outer clamping tube to have a tendency to rotate. However, the pressing plate is stuck in the mounting bracket, so the outer clamping tube will not actually rotate. However, the force that causes the outer clamping tube to rotate will be applied to the pressure sensor on the side where the rotation direction is located through the pressing plate. The greater the grinding resistance, the greater the force on the pressure sensor, and the two change synchronously.

[0014] In the above technical solution, the technical effects and advantages provided by the present invention are as follows: 1. By retracting the electric push rod, the rougher grinding belt is moved away from the cold-drawn tube, and by controlling the other electric push rod to extend, the other finer grinding belt is pushed to perform the grinding work. This method can complete the operation of replacing the grinding belt without interrupting the grinding process, ensuring the grinding efficiency and being more convenient; 2. By detecting the grinding resistance during the grinding process and judging the timing of replacing the grinding belt according to the change of the grinding resistance. During the grinding process, when the grinding resistance changes from large to small until there is no longer a large change, it indicates that it is time to replace the grinding belt. This method can judge the timing of replacing the grinding belt without interrupting the grinding process, ensuring the grinding efficiency and being more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is the overall structure diagram of the present invention; Figure 2 Structural diagram of the grinding component and the support table of the present invention; Figure 3 Structural diagram of the grinding component and the hollow adjusting head of the present invention; Figure 4 Of the present invention Figure 3 Enlarged view of part A; Figure 5 Internal structural diagram of the hollow adjusting head of the present invention; Figure 6 Exploded view of the dust collection component of the present invention; Figure 7 Structural diagram of the column and the clamping component of the present invention; Figure 8 Structural diagram of the clamping component of the present invention; Figure 9 Side view sectional view of the clamping component of the present invention; Figure 10 Structural diagram of the mounting bracket of the present invention; Figure 11 Structural diagram of the sliding sleeve of the present invention; Figure 12 System diagram of the present invention.

[0017] Explanation of reference numerals: Cold drawn tube; 2. Base; 3. Linear motor; 4. Column; 5. Support table; 6. Dust collection component; 601. Collection pipe; 602. Exhaust fan; 603. Sleeve; 604. Air inlet; 605. Filter bag; Clamping component; 701. Outer clamping tube; 702. Clamping bolt; 703. Inclined block; 704. Central tube; 705. Support airbag; 706. Vent hole; 707. Baffle; 708. Partition groove; 709. Sliding sleeve; 710. Hydraulic cylinder; 8. Controller; 9. Grinding component; 901. Electric push rod; 902. Fixed block; 903. U-shaped plate; 904. Fixed piece; 905. Grinding belt; 10. Motor; 11. Pressure plate; 12. Mounting bracket; 13. Hollow adjusting head; 1301. Adjusting block; 1302. Convex block; 1303. Support arm; 1304. Closed plate; 1305. Adjusting screw; 1306. Chute; 14. Drive shaft; 15. Electric slip ring; 16. End plate; 17. Pressure sensor. Detailed implementation manners

[0018] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further introduced in detail below with reference to the accompanying drawings.

[0019] The present invention provides as Figures 1-12A cold-drawn tube port grinding device shown in the figure includes a clamping assembly 7 for fixing the cold-drawn tube 1. A hollow adjusting head 13 is provided on one side of the clamping assembly 7, and a grinding assembly 9 is provided outside the hollow adjusting head 13. The grinding assembly 9 includes a plurality of fixing blocks 902 located outside the hollow adjusting head 13. An electric push rod 901 is provided on the fixing block 902. The front end of the electric push rod 901 is fixedly provided with a U-shaped plate 903. The telescopic movement of the electric push rod 901 can control the front and rear positions of the U-shaped plate 903. A grinding belt 905 is provided inside the U-shaped plate 903. Both ends of the grinding belt 905 are fixedly provided with fixing pieces 904. The fixing pieces 904 are installed on the inner wall of the U-shaped plate 903 through bolts. The U-shaped plate 903 can be stuck at the port of the cold-drawn tube 1, and the thicknesses of the respective grinding belts 905 are different.

[0020] During grinding, the entire grinding assembly 9 rotates. The electric push rod 901 pushes the U-shaped plate 903 closer to the cold-drawn tube 1, so that the grinding belt 905 in the U-shaped plate 903 is in close contact with the port of the cold-drawn tube 1. At the same time of contact, as the grinding assembly 9 rotates, the grinding belt 905 rubs against the port of the cold-drawn tube 1, thereby playing a role in grinding. The coarsest grinding belt 905 first performs the grinding work. The grinding belt 905 performing the grinding work contacts the cold-drawn tube 1, and the remaining grinding belts 905 do not contact the port of the cold-drawn tube 1. During the grinding process, according to the order from coarse to fine, the respective grinding belts 905 are sequentially replaced for grinding until all the grinding belts 905 are ground, then the grinding work is completed. During replacement, the controller 8 is used to control the corresponding electric push rod 901 to contract, so that the grinding belt 905 that has completed the work moves away from the cold-drawn tube 1, and the other electric push rod 901 is controlled to extend to push another finer grinding belt 905 to perform the grinding work. This method can complete the operation of replacing the grinding belt 905 without interrupting the grinding process, ensuring the grinding efficiency and being more convenient.

[0021] In order to make the grinding assembly 9 applicable to cold-drawn tubes 1 with different diameters, as Figure 3 、 5 shown, a regulating screw 1305 is rotatably connected to the inner wall of the hollow adjusting head 13. Two adjusting blocks 1301 are sleeved on the outer end of the regulating screw 1305 through threads. After the regulating screw 1305 rotates, the moving directions of the two adjusting blocks 1301 are opposite. A plurality of convex blocks 1302 are fixedly provided at the outer ends of the adjusting blocks 1301. A closing plate 1304 is provided at the front end of the hollow adjusting head 13 through bolts. The front end of the regulating screw 1305 extends to the front side of the closing plate 1304 and is fixedly provided with a handwheel. Two sets of sliding grooves 1306 are formed at the outer end of the hollow adjusting head 13. The two sets of sliding grooves 1306 correspond to the two adjusting blocks 1301 respectively. The number of each set of sliding grooves 1306 is multiple. The sliding grooves 1306 correspond to the convex blocks 1302 one by one. The convex blocks 1302 are embedded in the corresponding sliding grooves 1306. Two support arms 1303 are hinged to the side of the fixed block 902 facing the hollow adjusting head 13. One ends of the two support arms 1303 are respectively hinged to the convex blocks 1302 at the outer ends of the two adjusting blocks 1301. The number of the convex blocks 1302 at the outer end of each adjusting block 1301 is equal to and corresponds to the number of the fixed blocks 902 one by one.

[0022] Adjust the grinding assembly 9 according to the diameter of the cold-drawn tube 1. By rotating the handwheel to drive the adjusting screw 1305, under the action of the thread, the convex block 1302 moves along the adjusting screw 1305, and the two approach or move away from each other. When approaching, the convex block 1302 pushes the support arm 1303, so that the fixed block 902 moves away from the cold-drawn tube 1. When moving away, the convex block 1302 pulls the support arm 1303, and the fixed block 902 approaches the cold-drawn tube 1, so as to adjust the grinding assembly 9.

[0023] Before and after grinding, it is necessary to adjust the distance between the grinding assembly 9 and the cold-drawn tube 1. As Figure 1 、 2 shown, a base 2 is provided at the bottom of the clamping assembly 7. A linear motor 3 is fixedly provided at the top of the base 2. A support platform 5 is fixedly provided at the top of the mover of the linear motor 3. An end plate 16 is provided at the top of the support platform 5; Use the linear motor 3 to drive the support platform 5 and the grinding assembly 9 to move, bring the grinding assembly 9 close to the cold-drawn tube 1, and finally clamp the U-shaped plate 903 at the port of the cold-drawn tube 1 to be ground.

[0024] A driving shaft 14 is fixedly provided at the rear end of the hollow adjusting head 13. An electric slip ring 15 is sleeved on the outer end of the driving shaft 14. The circuit for controlling the electric push rod 901 is connected to the electric slip ring 15, which supplies power to the electric push rod 901 without affecting the rotation of the driving shaft 14. The rear end of the driving shaft 14 is rotatably connected to the end plate 16. A motor 10 for driving the driving shaft 14 to rotate is fixedly provided at the top of the end plate 16; The rear end of the driving shaft 14 penetrates through the end plate 16. The rear end of the driving shaft 14 is in belt transmission with the output shaft of the motor 10. During grinding, the motor 10 drives the driving shaft 14 to rotate, and then drives the hollow adjusting head 13 and the grinding assembly 9.

[0025] In order to prevent debris from scattering, as Figure 2 、 6As shown in the figure, one end of the support table 5 facing the cold drawn tube 1 is provided with a dust suction assembly 6. The dust suction assembly 6 includes a collection tube 601 provided on the support table 5. Exhaust fans 602 are provided on both sides of the collection tube 601. The exhaust fans 602 can extract the air in the collection tube 601. One end of the collection tube 601 is sleeved with a sleeve 603; An air inlet 604 is opened at the top end of the sleeve 603. A filter bag 605 is provided on the inner wall of the sleeve 603. The open end of the filter bag 605 is provided in the sleeve 603, and the main body part of the filter bag 605 is located in the collection tube 601.

[0026] By extracting the air in the collection tube 601 through the exhaust fans 602, the inside of the collection tube 601 is in negative pressure, thus generating suction. The grinding position is above the air inlet 604. Under the action of the suction, the debris generated during the grinding process is sucked into the sleeve 603 and the collection tube 601. Subsequently, after being filtered by the filter bag 605, the air is discharged, and the debris is collected in the filter bag 605 for unified treatment, so as to avoid the scattered grinding debris being difficult to clean up.

[0027] In order to clamp and fix the cold drawn tube 1, as Figures 7-12 shown in the figure, a column 4 is fixedly provided at the top end of the base 2. A controller 8 electrically connected to the electric push rod 901 is fixedly provided at the top end of the column 4. The electric push rod 901 is provided at the output end of the controller 8. The controller 8 can also be connected to a computer through a network to display relevant data and control the grinding device through the computer and the controller 8; The clamping assembly 7 includes an outer clamping tube 701 rotatably connected to one side of the column 4 facing the grinding assembly 9. A plurality of dividing grooves 708 are opened at the outer end of the outer clamping tube 701. A plurality of clamping bolts 702 are provided at the outer end of the outer clamping tube 701 through threads.

[0028] A plurality of inclined blocks 703 are fixedly provided at the outer end of the outer clamping tube 701. Each inclined block 703 is located between two adjacent dividing grooves 708. A sliding sleeve 709 is sleeved at the outer end of the outer clamping tube 701. Hydraulic cylinders 710 are provided on both sides of the sliding sleeve 709. The rear ends of the hydraulic cylinders 710 are fixedly connected to the column 4. The motor 10, the exhaust fans 602, the linear motor 3 and the hydraulic cylinders 710 are all provided at the output end of the controller 8; A pressing plate 11 is fixedly provided at the bottom end of the outer clamping tube 701. An installation bracket 12 is provided at the outer end of the column 4. Pressure sensors 17 are fixedly provided on the inner walls of both sides of the installation bracket 12. The bottom end of the pressing plate 11 extends into the installation bracket 12. The two pressure sensors 17 are respectively located on both sides of the pressing plate 11. The pressure sensors 17 are provided at the input end of the controller 8.

[0029] The sliding sleeve 709 is pushed by the hydraulic cylinder 710 to move. During the movement of the sliding sleeve 709, it presses against the outer end of the inclined block 703. Since the outer end of the inclined block 703 is in a slope shape, the extrusion on the inclined block 703 causes the outer clamping tube 701 to tighten, and the clamping bolt 702 thus clamps on the outer end of the cold-drawn tube 1, thereby fixing the cold-drawn tube 1 from the outer end. The clamping bolt 702 can be rotated and adjusted to be applicable to cold-drawn tubes 1 with different diameters.

[0030] Before grinding, the port of the cold-drawn tube 1 is rough and continuously becomes smooth during the grinding process. Therefore, during the grinding process of each grinding belt 905, the grinding resistance is first large and then small. The cold-drawn tube 1 is fixed on the clamping assembly 7, and the reaction force of the grinding resistance will cause the outer clamping tube 701 to have a tendency to rotate. However, the pressing plate 11 is stuck in the mounting bracket 12, so the outer clamping tube 701 will not actually rotate; However, the force that causes the outer clamping tube 701 to rotate will be applied to the pressure sensor 17 on the side where the rotation direction is located through the pressing plate 11. The greater the grinding resistance, the greater the force on the pressure sensor 17, and the two change synchronously. When a certain grinding belt 905 is grinding, the force on the pressure sensor 17 will change from large to small. When the force on the pressure sensor 17 becomes small and no longer changes significantly, it indicates that the grinding of this grinding belt 905 is sufficient, and a finer grinding belt 905 can be replaced for grinding. This method can judge the timing of replacing the grinding belt 905 without interrupting the grinding process, ensuring the grinding efficiency and being more convenient. For cold-drawn tubes with the same diameter, the greater the grinding resistance, the greater the force on the pressure sensor 17. However, the larger the diameter of the cold-drawn tube, the larger the force arm of the grinding resistance, and the greater the force on the pressure sensor 17. Therefore, when grinding cold-drawn tubes with different diameters, the judgment criteria also need to change correspondingly.

[0031] When fixing the cold-drawn tube 1, it is also necessary to support it. As Figure 9 shown, a central tube 704 is fixedly arranged on the inner wall of the outer clamping tube 701. A support airbag 705 is fixedly arranged at the outer end of the central tube 704. A plurality of air vents 706 are formed at the outer end of the central tube 704. The air vents 706 are located in the support airbag 705. The support airbag 705 is located inside the cold-drawn tube 1, and the outer clamping tube 701 is sleeved on the outer end of the cold-drawn tube 1; A baffle 707 is fixedly arranged at the outer end of the central tube 704. The rear end of the cold-drawn tube 1 contacts the baffle 707. A gas guide pipe with a valve is fixedly arranged at the outer end of the central tube 704. The top end of the gas guide pipe extends to the top of the outer clamping tube 701, and the gas guide pipe is located behind the baffle 707.

[0032] When fixing, insert one end of the cold-drawn tube 1 that does not need to be polished into the outer clamping tube 701 and abut it against the baffle 707. At the same time, insert the central tube 704 and the supporting airbag 705 into the cold-drawn tube 1. Meanwhile, inflate the inside of the central tube 704 through the air guide tube, and the air enters the supporting airbag 705 through the air permeable holes 706. The supporting airbag 705 expands due to inflation and supports inside the cold-drawn tube 1.

[0033] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, various different ways can be used to modify the described embodiments without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A cold-drawn pipe port grinding device, comprising a clamping assembly (7) for fixing a cold-drawn pipe (1), characterized in that: One side of the clamping assembly (7) is provided with a hollow adjusting head (13), and a grinding assembly (9) is arranged on the outer side of the hollow adjusting head (13); The grinding assembly (9) includes a plurality of fixed blocks (902) located on the outer side of the hollow adjusting head (13). An electric push rod (901) is arranged on the fixed block (902), and a U-shaped plate (903) is fixedly arranged at the front end of the electric push rod (901); A grinding belt (905) is arranged inside the U-shaped plate (903). Fixed pieces (904) are fixedly arranged at both ends of the grinding belt (905), and the fixed pieces (904) are installed on the inner wall of the U-shaped plate (903). The thicknesses of the grinding belts (905) are different.

2. The cold-drawn pipe end grinding device according to claim 1, characterized in that: An adjusting screw rod (1305) is rotatably connected to the inner wall of the hollow adjusting head (13). Two adjusting blocks (1301) are sleeved on the outer end of the adjusting screw rod (1305) through threads. A plurality of convex blocks (1302) are fixedly arranged at the outer ends of the adjusting blocks (1301). A closing plate (1304) is arranged at the front end of the hollow adjusting head (13), and the front end of the adjusting screw rod (1305) extends to the front side of the closing plate (1304); Two groups of sliding grooves (1306) are arranged at the outer end of the hollow adjusting head (13). The two groups of sliding grooves (1306) correspond to the two adjusting blocks (1301) respectively. The sliding grooves (1306) correspond to the convex blocks (1302) one by one. The convex blocks (1302) are embedded in the corresponding sliding grooves (1306). Two support arms (1303) are hinged to one side of the fixed block (902) facing the hollow adjusting head (13). One ends of the two support arms (1303) are respectively hinged to the convex blocks (1302) at the outer ends of the two adjusting blocks (1301).

3. A cold-drawn pipe end grinding device according to claim 1, characterized in that: A base (2) is arranged at the bottom of the clamping assembly (7). A linear motor (3) is fixedly arranged at the top end of the base (2). A support platform (5) is fixedly arranged at the top end of the mover of the linear motor (3). An end plate (16) is arranged at the top end of the support platform (5); A driving shaft (14) is fixedly arranged at the rear end of the hollow adjusting head (13). An electric slip ring (15) is sleeved on the outer end of the driving shaft (14). The rear end of the driving shaft (14) is rotatably connected to the end plate (16). A motor (10) for driving the driving shaft (14) to rotate is fixedly arranged at the top end of the end plate (16).

4. The cold-drawn pipe end grinding device according to claim 3, wherein: A dust suction assembly (6) is arranged at one end of the support platform (5) facing the cold-drawn tube (1). The dust suction assembly (6) includes a collecting pipe (601) arranged on the support platform (5). Exhaust fans (602) are arranged on both sides of the collecting pipe (601). A sleeve (603) is sleeved at one end of the collecting pipe (601); An air inlet (604) is arranged at the top end of the sleeve (603). A filter bag (605) is arranged on the inner wall of the sleeve (603).

5. The cold-drawn pipe end grinding device according to claim 3, characterized in that: A column (4) is fixedly arranged at the top end of the base (2). A controller (8) electrically connected to the electric push rod (901) is fixedly arranged at the top end of the column (4); The clamping assembly (7) includes an outer clamping tube (701) rotatably connected to one side of the column (4) facing the grinding assembly (9). A plurality of dividing grooves (708) are formed at the outer end of the outer clamping tube (701), and a plurality of clamping bolts (702) are provided at the outer end of the outer clamping tube (701) by means of threads.

6. The cold-drawn pipe port grinding device according to claim 5, wherein: A plurality of inclined blocks (703) are fixedly provided at the outer end of the outer clamping tube (701). A sliding sleeve (709) is sleeved on the outer end of the outer clamping tube (701). Hydraulic cylinders (710) are provided on both sides of the sliding sleeve (709), and the rear ends of the hydraulic cylinders (710) are fixedly connected to the column (4); A pressing plate (11) is fixedly provided at the bottom end of the outer clamping tube (701). An installation bracket (12) is provided at the outer end of the column (4). Pressure sensors (17) are fixedly provided on the inner walls of both sides of the installation bracket (12). The bottom end of the pressing plate (11) extends into the installation bracket (12), and the two pressure sensors (17) are respectively located on both sides of the pressing plate (11).

7. A cold-drawn pipe end grinding device according to claim 6, characterized in that: A central tube (704) is fixedly provided on the inner wall of the outer clamping tube (701). A support airbag (705) is fixedly provided at the outer end of the central tube (704). A plurality of ventilation holes (706) are formed at the outer end of the central tube (704), and the ventilation holes (706) are located in the support airbag (705); A baffle (707) is fixedly provided at the outer end of the central tube (704). The rear end of the cold-drawn tube (1) contacts the baffle (707). A gas guide pipe with a valve is fixedly provided at the outer end of the central tube (704).

8. A method for polishing the port of a cold-drawn tube using the polishing device according to any one of claims 1-7, characterized in that: The specific steps are as follows: Step 1: Fix the cold-drawn tube (1) to be ground on the clamping assembly (7), and the end to be ground is located outside the clamping assembly (7) and faces the grinding assembly (9); Step 2: After fixing the cold-drawn tube (1), adjust the grinding assembly (9) according to the diameter of the cold-drawn tube (1). Then, use the linear motor (3) to drive the support table (5) and the grinding assembly (9) to move, bring the grinding assembly (9) close to the cold-drawn tube (1), and finally clamp the U-shaped plate (903) at the port of the cold-drawn tube (1) to be ground; Step 3: After fixing the position of the grinding assembly (9), turn on the motor (10), use the motor (10) to drive the grinding assembly (9) to rotate, grind the cold-drawn tube (1), and while grinding, use the dust suction assembly (6) to suck and collect the debris generated during the grinding process; Step 4: During grinding, the roughest grinding belt (905) first performs the grinding work. During the grinding process, according to the order from coarse to fine, replace each grinding belt (905) in turn for grinding until all the grinding belts (905) are ground, then the grinding work is completed.

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