A production process for bearing steel pipe

Abstract

The present application relates to a bearing steel pipe production process, which includes the following steps: S1, cutting, cutting a rod into a plurality of tube blanks of equal length; S2, heating; S3, salting, salting the surface of the tube blank after heating in S2; S4, perforation; S5, annealing; S6, cold rolling; S7, stress relief annealing; S8, pickling; S9, cold drawing; S10, spheroidizing annealing; S11, straightening; S111, flaw detection; S12, marking; S13, storage. The present application can reduce the friction between the tube blank and the guide plate during perforation, and has the effect of reducing the possible wear on the surface of the tube blank.

Description

Technical Field

[0001] The present application relates to the field of bearing steel tube processing, and in particular to a bearing steel tube production process. Background Art

[0002] Bearing steel pipe refers to hot-rolled or cold-rolled seamless steel pipe used to manufacture ordinary rolling bearings. Since the bearings are under great pressure and friction during operation, there are higher requirements for the hardness and wear resistance of the bearing steel.

[0003] In the related technology, the production process of bearing steel pipe generally includes: cutting, heating, piercing, extrusion, annealing, cold rolling, stress relief annealing, pickling, cold drawing, spheroidizing annealing, straightening, marking, and warehousing. Usually, a two-roller oblique rolling piercing machine is used to pierce the tube blank. The two-roller oblique rolling piercing machine generally includes two rollers, two guide plates and a head. During the piercing process, the two guide plates fix the tube blank in the vertical direction, but the tube blank will produce more intense friction with the guide plate, which is easy to cause some wear and abrasion on the surface of the tube blank. Summary of the invention

[0004] In order to reduce the possibility of wear on the tube surface, the present application provides a bearing steel tube production process.

[0005] The present application provides a bearing steel tube production process that adopts the following technical solution:

[0006] A bearing steel pipe production process comprises the following steps: S1, cutting, cutting a rod into a plurality of tube blanks of equal length; S2, heating; S3, salting, salting the surface of the tube blank heated in S2; S4, perforating; S5, annealing; S6, cold rolling; S7, stress relief annealing; S8, pickling; S9, cold drawing; S10, spheroidizing annealing; S11, straightening; S12, marking; S13, warehousing.

[0007] By adopting the above technical solution, the bar is first cut into a plurality of tube blanks of equal length, and then the tube blanks are heated. After the tube blanks are heated, the surface of the tube blanks is treated with salt. After the salt contacts the surface of the tube blanks, it will be melted by the high temperature of the tube blanks, thereby lubricating the surface of the tube blanks, effectively reducing the friction between the tube blanks and the guide plate during perforation, thereby reducing the possibility of wear on the surface of the tube blanks. After perforation, the tube blanks are sequentially annealed, cold rolled, stress relieving annealed, pickled, cold drawn, straightened and marked, and then the marked bearing steel pipes are stored in the warehouse.

[0008] Optionally, there is S111 and flaw detection between S11 and S12.

[0009] By adopting the above technical solution, the quality of the steel pipe can be tested and the unqualified steel pipes can be screened out.

[0010] Optionally, S3 spreads salt on the heated tube blanks through a salt spreading device, the salt spreading device includes a frame, a storage box is arranged on the frame, a screen is arranged in the storage box, the screen divides the storage box into a salt storage part and a salt spreading part in a vertical direction, the salt storage part is located above the salt spreading part, the screen is slidably arranged on the storage box in a horizontal direction, a sliding mechanism for driving the screen to slide is arranged on the frame, and a salt spreading pipe is arranged at the bottom end of the salt spreading part.

[0011] By adopting the above technical solution, before work, salt is poured into the storage box first, so that the salt is temporarily stored on the screen. During work, the sliding mechanism is used to drive the screen to move in the horizontal direction, so that the salt on the screen is screened off. After the salt falls, it is discharged through the salt spreading pipe, so that salt is spread on the surface of the pipe blank when the pipe blank passes under the salt spreading pipe, and the operation is convenient.

[0012] Optionally, both ends of the screen extend out of the storage box, a sliding portion is provided at one end of the screen, a sliding groove is provided on the sliding portion and the sliding groove is perpendicular to the sliding direction of the screen, a slider is slidably provided in the sliding groove, the sliding mechanism includes a first gear, a connecting rod and a first driving member, the first gear is horizontally rotatably arranged on the frame, one end of the connecting rod is fixedly connected to the first gear, and the other end is hinged to the slider, and the first driving member is used to drive the first gear to rotate.

[0013] By adopting the above technical solution, the first driving member is used to drive the first gear to rotate, so that the end of the connecting rod away from the first gear rotates around the axis of the first gear, thereby driving the slider to move along the length direction of the slide groove, and at the same time driving the slider to move in a direction perpendicular to the length direction of the slide groove, thereby driving the sliding part to move in a direction perpendicular to the length direction of the slide groove, and then driving the screen to move in a direction perpendicular to the length direction of the slide groove, and the structure is simple.

[0014] Optionally, a crushing mechanism is provided in the salt storage section, and the crushing mechanism includes a stirring shaft, a second driving member and a plurality of cutters. The stirring shaft is vertically rotatably arranged on the frame and extends downward into the salt storage section. The plurality of cutters are arranged on the stirring shaft and are evenly distributed along the circumference of the stirring shaft. The second driving member is used to drive the stirring shaft to rotate. A partition is rotatably arranged on the salt storage section, and the rotation axis of the partition is horizontally arranged and arranged along the length direction of the partition. The partition is located between the stirring shaft and the screen. Connecting parts are arranged on both sides of the partition, and the cross-section of the connecting part is semicircular. When the partition is in a horizontal state, the two connecting parts respectively press against the two inner side walls of the salt storage section. A third driving member for driving the partition to rotate is arranged on the frame.

[0015] By adopting the above technical solution, when the salt is directly poured onto the screen, the salt will impact the screen, causing a portion of the salt to fall directly from the screen, resulting in a waste of salt. The third driving member is used to make the partition in a horizontal state, so that the salt is temporarily stored on the partition, thereby reducing the waste of salt; after the salt is poured into the storage box, the second driving member is used to drive the stirring shaft to rotate, and the rotation of the stirring shaft drives the cutter to rotate, thereby further cutting the salt piled on the partition, making the salt particle size smaller, so that the salt melts faster when it contacts the tube blank, thereby improving the lubrication effect on the tube blank. During operation, the third driving member is used to drive the partition to flip, so that the salt on the partition falls onto the screen, and when the partition contacts the screen, the screen can be slapped, which can effectively reduce the possibility of the screen being blocked.

[0016] Optionally, a spiral blade is provided on the stirring shaft, and the spiral blade is located above the cutter. When the stirring shaft rotates, the spiral blade is used to transport the salt downward.

[0017] By adopting the above technical solution, the spiral blades have a stirring effect on the salt when rotating, and the salt at the top moves to the bottom, so that the cutter can crush the salt above the partition more fully.

[0018] Optionally, a plurality of cutter heads are arranged on the outer side of the spiral blade.

[0019] By adopting the above technical solution, the spiral blades can also cut the salt when rotating, effectively improving the cutting effect on the salt above the partition.

[0020] Optionally, the salt spreading pipe is connected to a blowing pipe, and one end of the blowing pipe away from the salt spreading pipe is connected to an air source.

[0021] By adopting the above technical solution, the salt spreading pipe is blown with an air blower, so that the salt content at the end of the salt spreading pipe away from the storage box can be adjusted. The stronger the air pressure provided by the air source, the higher the gas content in the salt spreading pipe will be. Correspondingly, the salt content at the time of spraying will be reduced, and the structure is reasonable.

[0022] Optionally, the salt-spreading pipe includes a first part, a second part and a third part, the first part is connected to the bottom end of the storage box and is vertically arranged, the second part is arranged at an end of the first part away from the storage box and is horizontally arranged, the third part is arranged at an end of the second part away from the first part and is vertically arranged, the connection between the blowing pipe and the salt-spreading pipe is located at the connection between the first part and the second part, and the blowing pipe is used to blow air horizontally into the second part.

[0023] By adopting the above technical solution, the connection between the blowing pipe and the salt spreading pipe is located at the connection between the first part and the second part, and the blowing direction of the blowing pipe is along the length direction of the second part. When the salt flows from the first part to the second part, the movement direction of the salt changes from the vertical direction to the horizontal direction. Since the air flow direction is along the horizontal direction, the interception effect of the vertically falling salt is better and the structure is reasonable.

[0024] Optionally, connecting shafts are provided at both ends of the partition, and the end of the connecting shaft away from the partition is rotatably connected to the salt storage part, and the two connecting shafts are coaxial with the rotation axis of the partition. The third driving member includes a second gear, a third gear and a flipping motor, the second gear is coaxially fixedly connected to the connecting shaft, the flipping motor is arranged on the storage box, and the third gear is coaxially fixedly connected to the output shaft of the flipping motor and meshes with the second gear.

[0025] By adopting the above technical solution, the flipping motor drives the second gear to rotate, the second gear drives the third gear to rotate, the third gear drives the connecting shaft fixedly connected to it to rotate, and the connecting shaft drives the partition to rotate, thereby causing the partition to flip. The flipping motor has a self-locking function, which can keep the partition in a horizontal state, and the structure is reasonable.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. During production, the rod is first cut into multiple tube blanks of equal length, and then these tube blanks are heated. After heating, the surface of the tube blank is treated with salt. After the salt comes into contact with the surface of the tube blank, it will be melted by the high temperature of the tube blank, thereby lubricating the surface of the tube blank, effectively reducing the friction between the tube blank and the guide plate during perforation, thereby reducing the possibility of wear on the surface of the tube blank. After perforation, the tube blank is successively annealed, cold rolled, stress relieving annealing, pickling, cold drawing, straightening and flaw detection. Unqualified products are screened out for secondary processing, and qualified products are marked. Then the marked bearing steel pipes can be stored in the warehouse;

[0028] 2. When pouring salt directly onto the screen, the salt will collide with the screen, causing part of the salt to fall directly from the screen, resulting in salt waste. The third drive member is used to make the partition in a horizontal state so that the salt is temporarily stored on the partition, thereby reducing salt waste; after pouring the salt into the storage box, the second drive member is used to drive the stirring shaft to rotate, and the rotation of the stirring shaft drives the cutter to rotate, thereby further cutting the salt piled on the partition, making the salt particle size smaller, so that the salt melts faster when it contacts the pipe blank, thereby improving the lubrication effect on the pipe blank. During operation, the third drive member is used to drive the partition to flip, so that the salt on the partition falls onto the screen, and when the partition contacts the screen, it can beat the screen, which can effectively reduce the possibility of the screen being blocked;

[0029] 3. The first driving member is used to drive the first gear to rotate, so that the end of the connecting rod away from the first gear rotates around the axis of the first gear, thereby driving the slider to move along the length direction of the slide groove, and at the same time driving the slider to move in a direction perpendicular to the length direction of the slide groove, thereby driving the sliding part to move in a direction perpendicular to the length direction of the slide groove, and then driving the screen to move in a direction perpendicular to the length direction of the slide groove, thereby screening the salt on the screen, and the salt is discharged through the salt spreading pipe after falling, so that the surface of the pipe blank is salted when the pipe blank passes under the salt spreading pipe, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the salt spreading device in the embodiment of the present application.

[0031] Figure 2 It is a schematic diagram of the connection relationship between the storage box, the mounting frame, the mounting block, the mounting plate, the mounting shaft and the salt spreading pipe in the embodiment of the present application.

[0032] Figure 3 It is a schematic diagram of the connection relationship between the storage box, the screen and the sliding mechanism in the embodiment of the present application.

[0033] Figure 4 It is a schematic diagram of the connection relationship between the third driving member and the partition in the embodiment of the present application.

[0034] Figure 5 It is a cross-sectional view of a storage box and a screen in an embodiment of the present application.

[0035] Description of reference numerals: 1, frame; 2, storage box; 21, mounting frame; 22, mounting block; 23, mounting groove; 24, mounting plate; 25, mounting shaft; 26, screen; 261, sliding part; 262, sliding groove; 263, sliding block; 3, sliding mechanism; 31, first gear; 32, connecting rod; 33, first driving member; 331, rack; 332, cylinder; 41, salt storage part; 42, salt spreading part; 421, first zone; 422 , second zone; 43, partition; 431, connecting shaft; 432, connecting part; 44, fixed seat; 45, third driving member; 451, second gear; 452, third gear; 453, flip motor; 46, mounting seat; 5, crushing mechanism; 51, stirring shaft; 52, crushing motor; 53, cutter; 54, spiral blade; 55, cutter head; 6, salting tube; 61, first part; 62, second part; 63, third part; 7, blowing tube. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-5 This application is described in further detail.

[0037] The embodiment of the present application discloses a bearing steel tube production process. A bearing steel tube production process includes the following steps:

[0038] S1, cutting, cutting the bar into multiple tube blanks of equal length;

[0039] S2, heating;

[0040] S3, spreading salt, applying salt to the surface of the tube blank heated in S2;

[0041] S4, perforation;

[0042] S5, annealing;

[0043] S6, cold rolling;

[0044] S7, stress relief annealing;

[0045] S8, pickling;

[0046] S9, cold drawing;

[0047] S10, spheroidizing annealing;

[0048] S11, straightening;

[0049] S111, flaw detection;

[0050] S12, marking;

[0051] S13, storage.

[0052] Among them, S3 uses a salt spreading device to spread salt on the heated tube blank, refer to Figure 1and Figure 2 The salt spreading device includes a frame 1, on which a storage box 2 is fixedly mounted, the storage box 2 is vertically arranged, a horizontal mounting frame 21 is welded on the side wall of the storage box 2, the mounting frame 21 is parallel to the moving direction of the tube blank, a mounting block 22 along the length direction of the mounting frame 21 is welded on the mounting frame 21, and a mounting groove 23 along the length direction of the mounting frame 21 is opened on the side of the mounting block 22 facing the storage box 2, and the mounting groove 23 runs through both ends of the mounting block 22. A horizontal mounting plate 24 is welded on the upper surface of the mounting block 22, and a mounting shaft 25 is rotatably mounted on the mounting plate 24, and the mounting shaft 25 is located below the mounting plate 24.

[0053] Reference Figure 1 and Figure 3 A horizontal screen 26 is provided in the storage box 2. The screen 26 is slidably provided on the storage box 2 along the length direction of the mounting frame 21. Both ends of the screen 26 extend out of the storage box 2. A sliding portion 261 is provided at one end of the screen 26. A sliding groove 262 is provided on the sliding portion 261 along a direction perpendicular to the moving direction of the screen 26. A slider 263 is slidably provided in the sliding groove 262.

[0054] Reference Figure 1 and Figure 3 The frame 1 is provided with a sliding mechanism 3 for driving the screen 26 to slide. The sliding mechanism 3 includes a first gear 31, a connecting rod 32 and a first driving member 33. The first driving member 33 includes a rack 331 and a cylinder 332. The cylinder body of the cylinder 332 is welded to the mounting frame 21 and the piston rod is parallel to the mounting frame 21. The piston rod of the cylinder 332 is located on the side of the cylinder body of the cylinder 332 facing the slider 263. The rack 331 is slidably arranged in the mounting groove 23 along the length direction of the mounting groove 23, and one end of the rack 331 is welded and fixed to the piston rod of the cylinder 332. The first gear 31 is coaxially fixedly installed on the mounting shaft 25 and meshes with the rack 331. One end of the connecting rod 32 is fixedly connected to the mounting shaft 25 and the connecting rod 32 is located below the first gear 31. The other end of the connecting rod 32 is hinged to the slider 263.

[0055] The cylinder 332 drives the rack 331 to move along the length direction of the mounting frame 21, the rack 331 drives the first gear 31 to rotate, the rotation of the first gear 31 drives the mounting shaft 25 to rotate, the mounting shaft 25 drives the other end of the connecting rod 32 to rotate around the mounting shaft 25, and then the connecting rod 32 drives the slider 263 to move along the length direction of the mounting frame 21, and at the same time drives the slider 263 to move along the length direction of the slide groove 262, the movement of the slider 263 drives the sliding part 261 to move along the length direction of the mounting frame 21, and the movement of the sliding part 261 drives the screen 26 to move along the length direction of the mounting frame 21.

[0056] Reference Figure 4 and Figure 5The screen 26 divides the storage box 2 into a salt storage part 41 and a salt spreading part 42 in the vertical direction. The salt storage part 41 is located above the salt spreading part 42. A partition 43 is provided on the salt storage part 41. Connecting shafts 431 are welded at both ends of the partition 43. The two connecting shafts 431 are coaxial. The axis of the connecting shafts 431 passes through the geometric center of the partition 43. The end of the connecting shaft 431 away from the partition 43 is rotatably mounted on the salt storage part 41, and one of the connecting shafts 431 passes through the salt storage part 41, so that the partition 43 is rotatably mounted on the salt storage part 41. Connecting parts 432 are integrally provided on both sides of the partition 43. The cross section of the connecting part 432 is semicircular. When the partition 43 is in a horizontal state, the two connecting parts 432 are respectively pressed against the two inner side walls of the salt storage part 41.

[0057] Reference Figure 3 and Figure 4 A fixing seat 44 is welded on the outer wall of the salt storage section 41, and the fixing seat 44 is located on the side of the partition 43 facing the connecting shaft 431 passing through the salt storage section 41. A third driving member 45 for driving the partition 43 to rotate is arranged on the salt storage section 41, and the third driving member 45 includes a second gear 451, a third gear 452 and a flip motor 453. The second gear 451 is coaxially fixedly connected to the part of the connecting shaft 431 passing through the salt storage section 41, and the flip motor 453 is fixedly installed on the fixing seat 44. The third gear 452 is coaxially fixedly connected to the output shaft of the flip motor 453 and meshes with the second gear 451. The number of teeth of the third gear 452 is less than the number of teeth of the second gear 451.

[0058] The flip motor 453 drives the third gear 452 to rotate, the third gear 452 drives the connecting shaft 431 to rotate, and the connecting shaft 431 rotates to drive the partition 43 to flip. Since the number of teeth of the third gear 452 is less than that of the second gear 451, when the second gear 451 is driven to rotate one circle, the third gear 452 needs to rotate more circles, which is convenient for fine-tuning the angle of the partition 43. The flip motor 453 has a self-locking function, which can keep the partition 43 in a horizontal state.

[0059] Reference Figure 5 A mounting seat 46 is welded on the salt storage portion 41, and the upper surface of the mounting seat 46 is located above the salt storage portion 41. A crushing mechanism 5 is arranged in the salt storage portion 41, and the crushing mechanism 5 includes a stirring shaft 51, a second driving member, and three cutters 53. The second driving member includes a crushing motor 52, which is fixedly mounted on the mounting seat 46 and located above the mounting seat 46, and the output shaft of the crushing motor 52 vertically passes through the mounting seat 46 downward, the stirring shaft 51 is coaxially fixedly connected with the output shaft of the crushing motor 52 and extends downward into the salt storage portion 41, and the three cutters 53 are all welded on the stirring shaft 51 and are evenly distributed along the circumference of the stirring shaft 51.

[0060] Reference Figure 5A spiral blade 54 is welded on the stirring shaft 51, and the spiral blade 54 is spirally distributed along the length direction of the stirring shaft 51. When the spiral blade 54 rotates, it is used to transport salt downward. A plurality of cutter heads 55 are welded on the outer side of the spiral blade 54, and the plurality of cutter heads 55 are evenly distributed along the spiral direction of the spiral blade 54.

[0061] Reference Figure 5 The salt spreading part 42 includes a first area 421 and a second area 422, the first area 421 is located above the second area 422, and the longitudinal section of the second area 422 is an inverted trapezoid. The bottom end of the salt spreading part 42 is connected to the salt spreading pipe 6, and the salt spreading pipe 6 includes a first part 61, a second part 62 and a third part 63. The first part 61 is connected to the bottom end of the salt spreading part 42 and is vertically arranged, the second part 62 is integrally arranged at one end of the first part 61 away from the salt spreading part 42 and is horizontally arranged, and the third part 63 is integrally arranged at one end of the second part 62 away from the first part 61 and is vertically arranged.

[0062] Reference Figure 5 A blowing pipe 7 is connected to the salt spreading pipe 6, and one end of the blowing pipe 7 away from the salt spreading pipe 6 is connected to an air source. The connection between the blowing pipe 7 and the salt spreading pipe 6 is located at the connection between the first part 61 and the second part 62. The port of the blowing pipe 7 extending into the salt spreading pipe 6 is horizontally arranged, so as to blow air horizontally into the second part 62.

[0063] The implementation principle of a bearing steel pipe production process in the embodiment of the present application is as follows: during production, the rod is first cut into a plurality of tube blanks of equal length, and then the tube blanks are heated. After the tube blanks are heated, the surface of the tube blanks is salted. After the salt contacts the surface of the tube blanks, it will be melted by the high temperature of the tube blanks, thereby lubricating the surface of the tube blanks, effectively reducing the friction between the tube blanks and the guide plate during perforation, thereby reducing the possibility of wear on the surface of the tube blanks. After perforation, the tube blanks are sequentially annealed, cold rolled, stress relieving annealed, pickled, cold drawn, straightened and inspected, unqualified products are screened out for secondary processing, qualified products are marked, and then the marked bearing steel pipes are stored in the warehouse.

[0064] Before work, the partition 43 is placed in a horizontal state by using the flip motor 453, and then salt is poured into the storage box 2 so that the salt is temporarily stored on the partition 43. Then the crushing motor 52 is started to drive the cutter 53 and the spiral blade 54 to rotate, so as to further cut the salt piled on the partition 43, so that the salt particle size is smaller, so that the salt melts faster when it contacts the tube blank, thereby improving the lubrication effect on the tube blank.

[0065] The crushing motor 52 drives the cutter 53 and the spiral blade 54 to rotate forward and reverse continuously, so that the salt on the partition 43 can be stirred, so that the salt located above and the salt located below continuously exchange positions, thereby more fully crushing the salt on the partition 43.

[0066] During operation, the flipping motor 453 drives the partition 43 to flip through the third gear 452, the second gear 451 and the connecting shaft 431 in sequence, so that the salt on the partition 43 falls onto the screen 26, and when the partition 43 contacts the screen 26, the screen 26 can be tapped, which can effectively reduce the possibility of the screen 26 being blocked.

[0067] Then, the cylinder 332 is started, and the cylinder 332 drives the screen 26 to move along the length direction of the mounting frame 21 through the rack 331, the first gear 31, the mounting shaft 25, the connecting rod 32, the slider 263 and the sliding portion 261 in sequence, so that the salt on the screen 26 is screened off, and the salt falls into the salt spreading portion 42, and then enters the salt spreading pipe 6 under the guidance of the second zone 422, and is discharged through the salt spreading pipe 6, so that the surface of the tube blank is salted when the tube blank passes under the salt spreading pipe 6.

[0068] By blowing air to the salt spreading pipe 6 with the blowing pipe 7, the salt content at the end of the salt spreading pipe 6 away from the storage box 2 can be adjusted. The stronger the air pressure provided by the air source, the higher the gas content in the salt spreading pipe 6 will be, and accordingly, the salt content at the time of spraying will be reduced. When the salt flows from the first part 61 to the second part 62, the movement direction of the salt changes from the vertical direction to the horizontal direction. Since the air flow direction is in the horizontal direction, the interception effect of the vertically falling salt is better.

[0069] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bearing steel tube production process, characterized in that: The steps include: S1, cutting, cutting the bar into multiple billets of equal length; S2, heating; S3, spreading salt, applying salt to the surface of the blank heated in S2; S4, perforation; S5, annealing; S6, cold rolling; S7, stress relief annealing; S8, pickling; S9, cold drawing; S10, spheroidizing annealing; S11, straightening; S12, marking; S13, storage; S3: salting the heated blank by means of a salting device, the salting device comprising a frame (1), a storage box (2) being arranged on the frame (1), a screen (26) being arranged in the storage box (2), the screen (26) dividing the storage box (2) into a salt storage portion (41) and a salt spreading portion (42) in a vertical direction, the salt storage portion (41) being located above the salt spreading portion (42), the screen (26) being arranged on the storage box (2) in a sliding manner in a horizontal direction, a sliding mechanism (3) for driving the screen (26) to slide being arranged on the frame (1), and a salt spreading pipe (6) being arranged at the bottom end of the salt spreading portion (42); A crushing mechanism (5) is arranged in the salt storage section (41), and the crushing mechanism (5) comprises a stirring shaft (51), a second driving member, and a plurality of cutters (53). The stirring shaft (51) extends downward into the salt storage section (41). The plurality of cutters (53) are arranged on the stirring shaft (51) and are evenly distributed along the circumference of the stirring shaft (51). The second driving member is used to drive the stirring shaft (51) to rotate. A partition (43) is rotatably arranged on the salt storage section (41). The rotation axis of the partition (43) is arranged horizontally and extends along the partition (43). The partition (43) is arranged in the length direction, the partition (43) is located between the stirring shaft (51) and the screen (26), and connecting parts (432) are arranged on both sides of the partition (43), and the cross-section of the connecting part (432) is semicircular. When the partition (43) is in a horizontal state, the two connecting parts (432) respectively press against the two inner side walls of the salt storage part (41), and the frame (1) is provided with a third driving member (45) for driving the partition (43) to rotate, so that when the partition (43) contacts the screen (26), the screen (26) can be beaten; The salt spreading pipe (6) is connected to a blowing pipe (7), and one end of the blowing pipe (7) away from the salt spreading pipe (6) is connected to an air source; The salt spreading pipe (6) comprises a first part (61), a second part (62) and a third part (63); the first part (61) is connected to the bottom end of the storage box (2) and is arranged vertically; the second part (62) is arranged at an end of the first part (61) away from the storage box (2) and is arranged horizontally; the third part (63) is arranged at an end of the second part (62) away from the first part (61) and is arranged vertically; the connection between the blowing pipe (7) and the salt spreading pipe (6) is located at the connection between the first part (61) and the second part (62), and the blowing pipe (7) is used to blow air horizontally into the second part (62).

2. A bearing steel tube production process according to claim 1, characterized in that: There is S111 and NDT between S11 and S12.

3. A bearing steel tube production process according to claim 1, characterized in that: Both ends of the screen (26) extend out of the storage box (2); a sliding portion (261) is provided at one end of the screen (26); a sliding groove (262) perpendicular to the sliding direction of the screen (26) is provided on the sliding portion (261); a slider (263) is slidably provided in the sliding groove (262); the sliding mechanism (3) comprises a first gear (31), a connecting rod (32) and a first driving member (33); the first gear (31) is horizontally rotatably arranged on the frame (1); one end of the connecting rod (32) is fixedly connected to the first gear (31), and the other end is hinged to the slider (263); the first driving member (33) is used to drive the first gear (31) to rotate.

4. The bearing steel tube production process according to claim 1, characterized in that: The stirring shaft (51) is provided with a spiral blade (54), and the spiral blade (54) is located above the cutter (53). When the stirring shaft (51) rotates, the spiral blade (54) is used to transport the salt downward.

5. A bearing steel tube production process according to claim 4, characterized in that: A plurality of cutter heads (55) are arranged on the outer side of the spiral blade (54).

6. The production process of a bearing steel tube according to claim 1, characterized in that: A connecting shaft (431) is provided at both ends of the partition (43), and one end of the connecting shaft (431) away from the partition (43) is rotatably connected to the salt storage portion (41), and the two connecting shafts (431) are coaxial with the rotation axis of the partition (43). The third driving member (45) includes a second gear (451), a third gear (452) and a flip motor (453), and the second gear (451) is coaxially fixedly connected to the connecting shaft (431). The flip motor (453) is arranged on the storage box (2), and the third gear (452) is coaxially fixedly connected to the output shaft of the flip motor (453) and meshes with the second gear (451).

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