A pipe cold-rolled bearing ring device and processing method thereof

Abstract

The present invention discloses a pipe cold rolling bearing ring device and a processing method thereof. The device comprises a pressurizing unit, a grating ruler, a drive roller bearing seat, a cold rolling roller, a cold rolling roller bearing seat, a drive roller, a power source, and two frames. The drive roller is horizontally mounted on the two frames via the drive roller bearing seats at both ends and is connected to the power source. The cold rolling roller is horizontally mounted on the two frames via the cold rolling roller bearing seats at both ends and is located above and parallel to the drive roller. The cold rolling roller bearing seats at both ends of the cold rolling roller are respectively connected to a pressurizing unit, which pushes the cold rolling roller bearing seat downward to drive the cold rolling roller downward to complete the cold rolling of the raceway. The grating ruler is mounted on one of the frames and is used to measure the height of the cold rolling roller and the gap between the cold rolling roller and the drive roller. The gap between the cold rolling roller and the drive roller is adjusted by the pressurizing unit to accommodate seamless steel pipes of varying thicknesses. The present invention can effectively improve production efficiency, reduce worker workload, and reduce production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing production, in particular to a tube material cold rolling bearing ring device and a processing method thereof. Background Art

[0002] Bearings are essential components of mechanical equipment. Their primary purpose is to support rotating bodies and reduce friction during rotation, thereby ensuring high rotational accuracy and speed. There are many different types of bearings, used in a wide range of applications, including automobiles, railway vehicles, various industrial machinery, and household appliances.

[0003] Previously, bearing rings were mostly produced using forging, but this resulted in low material utilization and lengthy production processes. Currently, forging is being replaced by turning seamless bearing steel tubes for large-scale production of small and medium-sized bearing rings. Medium-scale production utilizes flat forging / forging-rolling-shaping, while small-scale production utilizes hammer forging-rolling.

[0004] Currently, most of the processes for processing bearing rings using seamless steel pipes are turning. Turning steel pipes inevitably wastes the thickness of the turning tool and the part fixed by the three-jaw or four-jaw chuck, resulting in reduced material utilization. In addition, turning has high technical requirements for workers and high labor intensity.

[0005] Rolling is an almost lossless processing method. Currently, heated cross-rolled and slit bearing steel pipes are the main form of rolled bearing steel pipes. However, it has high requirements on equipment and heating temperature. Usually, the heating temperature needs to reach above 1100°C and the heating time is long. Usually, the heating and holding time is more than 5 hours. The energy consumption is huge. Cross-rolled slitting requires pre-punching. The increase in the process increases the labor cost and reduces the production efficiency. The heating will destroy the complete metal streamline formed after rolling, and the performance improvement of the finished product is small. With the popularization of the process of producing seamless steel pipes by cold drawing annealing, cold-rolled bearing steel pipes have become feasible. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to propose a pipe cold-rolled bearing ring device and a processing method thereof that are simple, reliable, easy to operate, and can effectively improve production efficiency, reduce worker workload and production costs.

[0007] To achieve the above-mentioned purpose, the technical solution provided by the present invention is: a pipe cold rolling bearing ring device, including a pressure unit, a grating ruler, a driving roller bearing seat, a cold rolling roller, a cold rolling roller bearing seat, a driving roller, a power source and two frames; the driving roller is horizontally arranged on the two frames through the driving roller bearing seats at both ends of the driving roller, and is connected to the power source, and the power is provided by the power source to rotate; the cold rolling roller is horizontally arranged on the two frames through the cold rolling roller bearing seats at both ends of the cold rolling roller, and is located above the driving roller and parallel to the driving roller; the cold rolling roller bearing seats at both ends of the cold rolling roller are respectively connected to a pressure unit, and one frame is equipped with a pressure unit, and the pressure unit pushes the cold rolling roller bearing seat to move downward to drive the cold rolling roller to press down and complete the roller cold rolling; the grating ruler is installed on one of the frames, and is used to measure the height of the cold rolling roller and the gap value between the cold rolling roller and the driving roller, and adjusts the gap between the cold rolling roller and the driving roller through the pressure unit to adapt to seamless steel pipes of different thicknesses, and the seamless steel pipe is sleeved on the driving roller.

[0008] Furthermore, the cold rolling roller is assembled from a cold rolling ring and a core roller. The cold rolling ring is mounted on the core roller and is used to machine a raceway on the surface of the seamless steel pipe. The core roller surface has threaded holes equidistantly opened and is fixed to the cold rolling ring with bolts.

[0009] Furthermore, the pressurizing unit is a screw stepper motor, the screw of the screw stepper motor is fixed on the corresponding frame, and its external drive motor is connected to the cold rolling roller bearing seat. The screw rotation pushes the external drive motor downward, thereby pushing the cold rolling roller downward.

[0010] Furthermore, the pressurizing unit is a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixed on the corresponding frame, and the hydraulic rod is connected to the cold rolling roller bearing seat. The hydraulic piston is pushed downward to drive the hydraulic rod, thereby pushing the cold rolling roller downward.

[0011] Furthermore, the pressure unit is a jack, the base of the jack is fixed on the cold rolling roller bearing seat, and its support rod supports the corresponding frame. By twisting the pressure rod of the jack, the support rod is raised, thereby pushing the cold rolling roller downward.

[0012] Furthermore, the power source includes a reducer and a servo motor equipped with a frequency converter. The drive roller is connected to the reducer through a key coupling, and the reducer is connected to the servo motor. The two frames are fastened together with two screws and matching nuts. The drive roller bearing seat and the cold rolling roller bearing seat both use sliding bearings, and the sliding bearings are hot-mounted on the drive roller bearing seat and the cold rolling roller bearing seat. The sliding bearings are clearance-fitted with the cold rolling roller and the drive roller.

[0013] Furthermore, the pipe cold rolling bearing ring device also includes a stepper motor and a guide rail. The power source is located outside one of the frames, which is defined as the first frame. The other frame is slidably installed on the guide rail, which is defined as the second frame. The stepper motor is connected to the second frame through a screw rod. The screw rod passes through the bottom of the second frame and is locked with a nut. The second frame can move along the guide rail under the drive of the stepper motor, thereby increasing the distance between it and the first frame to perform the cold rolling roller replacement operation.

[0014] Furthermore, the pipe cold rolling bearing ring device also includes a hydraulic cylinder and a guide rail. The power source is located outside one of the frames, which is defined as the first frame. The other frame is slidably installed on the guide rail, which is defined as the second frame. The hydraulic cylinder is connected to the second frame through a hydraulic rod. The second frame can move along the guide rail under the drive of the hydraulic cylinder, thereby increasing the distance between it and the first frame to perform the cold rolling roller replacement operation.

[0015] Furthermore, the pipe material cold rolling bearing ring device also includes an auxiliary clamping mechanism, which is composed of an upper and lower part and a shell. The upper part is composed of a telescopic rod with four hinge rods. One end of the telescopic rod is fixed to the shell, and the other end is a free end. Two hinge rods are symmetrically hinged on both sides of the free end. The two hinge rods are respectively hinged to a hinge rod fixed to the shell. By pulling out the telescopic rod, the four hinge rods can be driven to support the cold rolling roller bearing seat on one of the frames. The frame is defined as the second frame. The lower part is composed of five gears with four The worm gear mechanism is composed of five gears, which are composed of a driving gear and four driven gears. The driving gear is equipped with a handle. The four driven gears are distributed around the driving gear and mesh with it for transmission. One driven gear is paired with a worm gear mechanism. The driven gear is coaxially fixed with the worm wheel of the corresponding worm gear mechanism and can drive the worm wheel to rotate through the coupling, thereby driving the worm of the corresponding worm gear mechanism to move. The worm is fastened to the driving roller bearing seat by a nut, thereby driving the driving roller bearing seat to be pulled out of the second frame to replace the seamless steel pipe.

[0016] The present invention also provides a method for processing the above-mentioned tube cold-rolled bearing ring device, which comprises the following steps:

[0017] First, a lathe is used to remove the oxide layer on the surface of the annealed cold-drawn seamless steel pipe. After completion, the seamless steel pipe is put on the driving roller. Then the power source is started to rotate the driving roller, thereby driving the seamless steel pipe and the cold rolling roller to rotate. The pressure unit is then started to press the cold rolling roller down, and the cold rolling ring processes a raceway on the surface of the seamless steel pipe. The pressure unit is then reset, driving the cold rolling roller to reset. The above process is repeated. Multiple bearing rings can be processed in one clamping. Semi-finished bearing rings are cut to obtain semi-finished products. The semi-finished products are deburred and cleaned. Subsequent heat treatment or sizing is performed as required to obtain qualified finished bearing rings.

[0018] If it is necessary to process bearing rings of different diameters, it is necessary to replace cold rolling rollers of different sizes, and according to the working environment with different loads, the stepper motor or hydraulic cylinder is selected to drive the roller change; when changing the roller under low load conditions, the stepper motor is used to open the distance between the second frame and the first frame, and after the cold rolling roller is separated from the cold rolling roller bearing seat, the original cold rolling roller is taken out and replaced with a new cold rolling roller, and then the second frame is reset by the stepper motor, and after the new cold rolling roller is installed in the cold rolling roller bearing seat, the stepper motor is stopped and the second frame is fixed to complete the roller changing operation; when changing the roller under high load conditions, the hydraulic cylinder is used to open the distance between the second frame and the first frame, and after the cold rolling roller is separated from the cold rolling roller bearing seat, the original cold rolling roller is taken out and replaced with a new cold rolling roller, and then the second frame is reset by the hydraulic cylinder, and after the new cold rolling roller is installed in the cold rolling roller bearing seat, the hydraulic cylinder is stopped and the second frame is fixed to complete the roller changing operation;

[0019] If a seamless steel pipe is processed and needs to be replaced with a new seamless steel pipe for processing, first, pull out the telescopic rod to drive the four hinge rods to form a support to support the cold rolling roller bearing seat, then rotate the handle on the driving gear to drive the driving gear to rotate, and the four driven gear couplings drive the worm gear to rotate, thereby driving the worm to move, and then drive the driving roller bearing seat to be pulled out of the second frame through the worm, take out the processed seamless steel pipe, and then load the seamless steel pipe to be processed into the driving roller. Finally, rotate the handle on the driving gear in the opposite direction and install the driving roller bearing seat back to the second frame to complete the seamless steel pipe replacement operation.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0021] The present invention uses annealed cold-drawn seamless steel pipes as raw materials. Compared with forging materials, the utilization rate is high, the production efficiency is high, and it is energy-saving and environmentally friendly. Compared with hot-rolled slit and perforated rough pipes, cold rolling saves energy. At the same time, the cold working hardening effect strengthens the raceway surface and improves the surface hardness. The good metal streamlines formed by rolling will not be destroyed due to heating, which greatly improves the performance of the finished product.

[0022] The device designed by the present invention has a simple and reliable structure, low cost, convenient assembly, simple operation, good rigidity of the whole machine, and can meet the processing needs of small and medium-sized bearing rings of various diameters.

[0023] The device designed in the present invention can process the entire pipe material in one clamping, and does not need to be cut before being put into the ring rolling machine for processing, which reduces the workload of workers and production costs and greatly improves production efficiency.

[0024] The processing method designed in the present invention has high tolerance accuracy of the parts obtained after processing, small unevenness of the ring wall thickness, meets the accuracy requirements of ordinary bearings, and can easily and quickly process small and medium-sized bearing rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the tube cold-rolled bearing ring device in Example 1.

[0026] Figure 2 This is a schematic diagram of the installation of the pressurizing unit in Example 1.

[0027] Figure 3 Schematic diagram of the structure of the cold rolling roller in Example 1.

[0028] Figure 4a This is one of the installation diagrams of the stepper motor, guide rails and second frame in Example 1.

[0029] Figure 4b This is the second installation diagram of the stepper motor, guide rail and second frame in Example 1.

[0030] Figure 5 It is a structural diagram of the auxiliary clamping mechanism in Example 1.

[0031] Figure 6 for Figure 5 AA cross-sectional view.

[0032] Figure 7 This is a schematic diagram of the installation of the pressurizing unit in Example 2.

[0033] Figure 8 This is a schematic diagram of the installation of the pressurizing unit in Example 3.

[0034] Figure 9a This is one of the installation diagrams of the hydraulic cylinder, guide rails and second frame in Example 4.

[0035] Figure 9b This is the second installation diagram of the hydraulic cylinder, guide rails and second frame in Example 4. DETAILED DESCRIPTION

[0036] The present invention will be described in further detail below with reference to the embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0037] Example 1

[0038] like Figures 1 to 6As shown, this embodiment discloses a pipe cold rolling bearing ring device, including a pressurizing unit 1, a grating ruler 3, an auxiliary clamping mechanism 4, a driving roller bearing seat 5, a stepping motor 6, a cold rolling roller, a guide rail 8, a cold rolling roller bearing seat 10, a driving roller 13, a power source and two frames 14; the driving roller 13 is horizontally arranged on the two frames 14 through the driving roller bearing seats 5 at both ends thereof, and is connected to the power source, and the power is provided by the power source to rotate; the power source is located outside one of the frames 14 (this frame is defined as the first frame); the cold rolling roller is horizontally arranged on the two frames 14 through the cold rolling roller bearing seats 10 at both ends thereof, and is located above the driving roller 13 and parallel to the driving roller 13; the cold rolling roller shafts at both ends of the cold rolling roller The support 10 is connected to a pressurizing unit 1 respectively, and a frame 14 is equipped with a pressurizing unit 1, and the pressurizing unit 1 pushes the cold rolling roller bearing seat 10 to move downward to drive the cold rolling roller to press down and complete the roller cold rolling; the grating ruler 3 is installed on one of the frames 14 (the frame is defined as the second frame), which is used to measure the height of the cold rolling roller and the gap value between the cold rolling roller and the driving roller 13, and adjust the gap between the cold rolling roller and the driving roller 13 through the pressurizing unit 1 to adapt to seamless steel pipes 11 of different thicknesses. The seamless steel pipe 11 is mounted on the driving roller 13; the two frames 14 are fastened together with two screws and matching nuts to increase stability; the second frame is slidably installed on the guide rail 8, and the stepper motor 6 The second frame is connected by a screw rod 7, and the screw rod 7 passes through the bottom of the second frame and is locked with a nut. The second frame can be moved along the guide rail 8 under the drive of the stepping motor 6, thereby widening the distance between it and the first frame to perform the operation of replacing the cold rolling roller; the auxiliary clamping mechanism 4 is composed of an upper and lower part and a shell 21. The upper part is composed of a telescopic rod 22 and four hinge rods 28. One end of the telescopic rod 22 is fixed on the shell 21, and the other end is a free end. Two hinge rods 28 are symmetrically hinged on both sides of the free end. The two hinge rods 28 are respectively hinged to a hinge rod 28 fixed to the shell 21. By pulling out the telescopic rod 22, the four hinge rods 28 can be driven to support the cold rolling roller on one of the frames 14. The roller bearing seat 10 defines the frame as the second frame, and the lower part is composed of five gears and four worm gear mechanisms. The five gears are composed of a driving gear 23 and four driven gears 24. The driving gear 23 is equipped with a handle, and the four driven gears 24 are distributed around the driving gear 23 and mesh with it for transmission. One driven gear 24 is paired with a worm gear mechanism, and the driven gear 24 is coaxially fixed with the worm wheel 26 of the corresponding worm gear mechanism, and can drive the worm wheel 26 to rotate through the coupling, thereby driving the worm 25 of the corresponding worm gear mechanism to move, and the worm 25 is fastened to the driving roller bearing seat 5 by a nut, thereby driving the driving roller bearing seat 5 to be pulled out of the second frame to replace the seamless steel pipe 11.

[0039] Preferably, the cold rolling roller is assembled from a cold rolling ring 9 and a core roller 2. The cold rolling ring 9 is mounted on the core roller 2 and is used to machine a raceway on the surface of the seamless steel pipe 11. The surface of the core roller 2 has threaded holes equidistantly opened and is connected and fixed to the cold rolling ring 9 using M6 bolts 17.

[0040] Preferably, the pressurizing unit 1 is a screw stepping motor (see Figure 2 As shown in the figure mark 18), the screw of the screw stepper motor 18 is fixed on the corresponding frame 14, and its external drive motor is connected to the cold rolling roller bearing seat 10. The screw rotation pushes the external drive motor downward, thereby pushing the cold rolling roller downward.

[0041] Preferably, the power source includes a reducer 15 and a servo motor 16 equipped with a frequency converter 27 , the driving roller 13 is connected to the reducer 15 via a key coupling 12 , and the reducer 15 is connected to the servo motor 16 .

[0042] Preferably, the driving roller bearing seat 5 and the cold rolling roller bearing seat 10 both use sliding bearings, and the sliding bearings are hot-mounted on the driving roller bearing seat 5 and the cold rolling roller bearing seat 10. The sliding bearings are clearance-fitted with the cold rolling roller and the driving roller 13, which ensures axis alignment and facilitates disassembly.

[0043] Example 2

[0044] The difference from the first embodiment is that the pressurizing unit 1 in this embodiment is a hydraulic cylinder (see Figure 7 As shown in the figure mark 19), the cylinder body of the hydraulic cylinder 19 is fixed on the corresponding frame 14, and its hydraulic rod is connected to the cold rolling roller bearing seat 10. The hydraulic piston is pushed downward by the hydraulic pressure to push the hydraulic rod, thereby pushing the cold rolling roller downward.

[0045] Example 3

[0046] The difference from the first embodiment is that the pressurizing unit 1 in this embodiment is a jack (see Figure 8 As shown in the figure mark 20), the base of the jack is fixed on the cold rolling roller bearing seat 10, and its support rod is against the corresponding frame 14. The support rod is raised by twisting the pressure rod of the jack, thereby pushing the cold rolling roller downward.

[0047] Example 4

[0048] The difference from the first embodiment is that the hydraulic cylinder 29 is used to pull the second frame to move on the slide rail 8. Figure 9a 、 Figure 9b As shown, the hydraulic cylinder 29 is connected to the second frame through a hydraulic rod 30. The second frame can move along the guide rail 8 under the drive of the hydraulic cylinder 29, thereby increasing the distance between it and the first frame to perform the cold rolling roller replacement operation.

[0049] The following is a processing method for the tube cold-rolled bearing ring device described in any one of Examples 1-4, the specific details of which are as follows:

[0050] First, a lathe is used to remove the oxide layer on the surface of the annealed cold-drawn seamless steel tube 11. After completion, the seamless steel tube 11 is inserted into the driving roller 13. Then, the power source is started to rotate the driving roller 13, thereby driving the seamless steel tube 11 and the cold rolling roller to rotate. Then, the pressurizing unit 1 is started to press the cold rolling roller down, and the cold rolling ring 9 processes a raceway on the surface of the seamless steel tube 11. Then, the pressurizing unit 1 is reset, driving the cold rolling roller to reset. The above process is repeated, and multiple bearing rings can be processed in one clamping. Semi-finished bearing rings are cut to obtain semi-finished products. The semi-finished products are deburred and cleaned. Subsequent heat treatment or sizing is performed as required to obtain qualified finished bearing rings.

[0051] If it is necessary to process bearing rings of different diameters, it is necessary to replace cold rolling rollers of different sizes, and according to the working environment with different loads, the stepper motor 6 or the hydraulic cylinder 29 is selected to drive the roller change; when changing the roller under low load conditions, the stepper motor 6 is used to open the distance between the second frame and the first frame, and after the cold rolling roller is separated from the cold rolling roller bearing seat 10, the original cold rolling roller is taken out and replaced with a new cold rolling roller, and then the second frame is reset by the stepper motor 6, and after the new cold rolling roller is installed in the cold rolling roller bearing seat 10, the stepper motor 6 is stopped and the second frame is fixed, and the roller changing operation is completed; when changing the roller under high load conditions, the hydraulic cylinder 29 is used to open the distance between the second frame and the first frame, and after the cold rolling roller is separated from the cold rolling roller bearing seat 10, the original cold rolling roller is taken out and replaced with a new cold rolling roller, and then the second frame is reset by the hydraulic cylinder 29, and after the new cold rolling roller is installed in the cold rolling roller bearing seat 10, the hydraulic cylinder 29 is stopped and the second frame is fixed, and the roller changing operation is completed;

[0052] If a seamless steel pipe 11 is processed and needs to be replaced with a new seamless steel pipe 11 for processing, first, pull out the telescopic rod 22 to drive the four hinge rods 28 to form a support to support the cold rolling roller bearing seat 10, then rotate the handle on the driving gear 23 to drive the driving gear 23 to rotate, and the four driven gears 24 drive the worm gear 26 to rotate, thereby driving the worm 25 to move, and then drive the driving roller bearing seat 5 to be pulled out of the second frame through the worm 25, take out the processed seamless steel pipe 11, and then load the seamless steel pipe to be processed into the driving roller 13. Finally, rotate the handle on the driving gear 23 in the opposite direction and install the driving roller bearing seat 5 back to the second frame to complete the seamless steel pipe replacement operation.

[0053] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A tube cold rolling bearing ring device, characterized by: The invention comprises a pressurizing unit (1), a grating ruler (3), an auxiliary clamping mechanism (4), a driving roller bearing seat (5), a cold rolling roller, a cold rolling roller bearing seat (10), a driving roller (13), a power source and two frames (14); the driving roller (13) is horizontally arranged on the two frames (14) through the driving roller bearing seats (5) at both ends thereof and is connected to the power source, and is powered by the power source to rotate; the cold rolling roller is horizontally arranged on the two frames (14) through the cold rolling roller bearing seats (10) at both ends thereof and is located above the driving roller (13) and is parallel to the driving roller (13); the cold rolling rollers at both ends thereof are arranged on the two frames (14) The roller bearing seats (10) are respectively connected to a pressurizing unit (1), and a frame (14) is equipped with a pressurizing unit (1), and the pressurizing unit (1) pushes the cold rolling roller bearing seat (10) to move downward to drive the cold rolling roller to press down and complete the roller cold rolling; the grating ruler (3) is installed on one of the frames (14) and is used to measure the height of the cold rolling roller and the gap value between the cold rolling roller and the driving roller (13), and adjust the gap between the cold rolling roller and the driving roller (13) through the pressurizing unit (1) to adapt to seamless steel pipes (11) of different thicknesses, and the seamless steel pipe (11) is sleeved on the driving roller (13); The pressurizing unit (1) is a screw stepper motor, the screw of the screw stepper motor is fixed on the corresponding frame (14), and the external drive motor is connected to the cold rolling roller bearing seat (10). The screw rotates to push the external drive motor downward, thereby pushing the cold rolling roller downward; The auxiliary clamping mechanism (4) is composed of an upper part, a lower part and a shell (21), the upper part is composed of a telescopic rod (22) and four hinge rods (28), one end of the telescopic rod (22) is fixed on the shell (21), and the other end is a free end, and two hinge rods (28) are symmetrically hinged on both sides of the free end, and the two hinge rods (28) are respectively hinged to a hinge rod (28) fixed on the shell (21), and by pulling out the telescopic rod (22), the four hinge rods (28) can be driven to support the cold rolling roller bearing seat (10) on one of the frames (14), and the frame is defined as the second frame. The lower part is composed of five gears and four worm gear mechanisms, and the five The gears are composed of a driving gear (23) and four driven gears (24). The driving gear (23) is provided with a handle. The four driven gears (24) are distributed around the driving gear (23) and mesh with it for transmission. One driven gear (24) is paired with a worm gear mechanism. The driven gear (24) is coaxially fixed with a worm wheel (26) of the corresponding worm gear mechanism and can drive the worm wheel (26) to rotate by coupling, thereby driving the worm (25) of the corresponding worm gear mechanism to move. The worm (25) is fastened to the driving roller bearing seat (5) through a nut, thereby driving the driving roller bearing seat (5) to be withdrawn from the second frame to perform the operation of replacing the seamless steel pipe (11).

2. The tube cold rolling bearing ring device according to claim 1, characterized in that: The cold rolling roller is assembled from a cold rolling ring (9) and a core roller (2). The cold rolling ring (9) is mounted on the core roller (2) and is used to machine a raceway on the surface of the seamless steel pipe (11). The surface of the core roller (2) is provided with threaded holes at equal intervals and is connected and fixed to the cold rolling ring (9) using bolts (17).

3. The tube cold rolling bearing ring device according to claim 2, characterized in that: The pressurizing unit (1) is a hydraulic cylinder, the cylinder body of which is fixed on a corresponding frame (14), and the hydraulic rod of which is connected to the cold rolling roller bearing seat (10), and the hydraulic piston is pushed downward by the hydraulic pressure to push the hydraulic rod, thereby pushing the cold rolling roller downward.

4. The tube cold rolling bearing ring device according to claim 3, characterized in that: The pressurizing unit (1) is a jack, the base of which is fixed on the cold rolling roller bearing seat (10), and the support rod thereof is supported against the corresponding frame (14). By twisting the pressurizing rod of the jack, the support rod is raised, thereby pushing the cold rolling roller downward.

5. The tube cold rolling bearing ring device according to claim 4, characterized in that: The power source includes a reducer (15) and a servo motor (16) equipped with a frequency converter (27); the driving roller (13) is connected to the reducer (15) through a key coupling (12); the reducer (15) is connected to the servo motor (16); the two frames (14) are fastened together by two screws and matching nuts; the driving roller bearing seat (5) and the cold rolling roller bearing seat (10) both use sliding bearings, the sliding bearings are heat-fitted to the driving roller bearing seat (5) and the cold rolling roller bearing seat (10), and the sliding bearings are clearance-fitted to the cold rolling roller and the driving roller (13).

6. The tube cold rolling bearing ring device according to claim 5, characterized in that: The invention also includes a stepper motor (6) and a guide rail (8), wherein the power source is located outside one of the frames (14), which is defined as the first frame, and the other frame (14) is slidably mounted on the guide rail (8), which is defined as the second frame, and the stepper motor (6) is connected to the second frame via a screw rod (7), which passes through the bottom of the second frame and is locked with a nut. The second frame can move along the guide rail (8) under the drive of the stepper motor (6), thereby increasing the distance between the second frame and the first frame to perform the operation of replacing the cold rolling roller.

7. The tube cold rolling bearing ring device according to claim 6, characterized in that: The invention also includes a hydraulic cylinder (29) and a guide rail (8), wherein the power source is located outside one of the frames (14), and the frame is defined as a first frame. The other frame (14) is slidably mounted on the guide rail (8), and the frame is defined as a second frame. The hydraulic cylinder (29) is connected to the second frame through a hydraulic rod. The second frame can move along the guide rail (8) under the drive of the hydraulic cylinder (29), thereby increasing the distance between the second frame and the first frame to perform the operation of replacing the cold rolling roller.

8. The method for processing a tube cold-rolled bearing ring device according to claim 7, characterized in that: Do the following: First, a lathe is used to remove the surface oxide layer of the annealed cold-drawn seamless steel pipe (11), and after completion, the seamless steel pipe (11) is placed on the driving roller (13); then the power source is started to rotate the driving roller (13), thereby driving the seamless steel pipe (11) and the cold rolling roller to rotate, and then the pressure unit (1) is started to press the cold rolling roller downward, and the cold rolling ring (9) processes a raceway on the surface of the seamless steel pipe (11); then the pressure unit (1) is reset, driving the cold rolling roller to reset, and the above process is repeated, so that multiple bearing rings can be processed in one clamping, and semi-finished bearing rings can be obtained by cutting, and the semi-finished products are deburred and cleaned. Subsequent heat treatment or sizing is performed as required to obtain qualified finished bearing rings; If it is necessary to process bearing rings of different diameters, it is necessary to replace cold rolling rollers of different sizes, and according to the working environment of different loads, the stepper motor (6) or the hydraulic cylinder (29) is selected to drive the roller replacement; when the roller is replaced under low load conditions, the stepper motor (6) is used to open the distance between the second frame and the first frame, and after the cold rolling roller is separated from the cold rolling roller bearing seat (10), the original cold rolling roller is taken out and replaced with a new cold rolling roller, and then the second frame is reset by the stepper motor (6), and the new cold rolling roller is installed in the cold rolling roller bearing seat. (10), stop the stepper motor (6), fix the second frame, and complete the roll changing operation; when changing the roll under high load, the distance between the second frame and the first frame is pulled apart by the hydraulic cylinder (29), and after the cold roll is separated from the cold roll bearing seat (10), the original cold roll is taken out and replaced with a new cold roll, and then the second frame is reset by the hydraulic cylinder (29), and after the new cold roll is installed in the cold roll bearing seat (10), stop the hydraulic cylinder (29), fix the second frame, and complete the roll changing operation; If a seamless steel pipe (11) is processed and a new seamless steel pipe (11) is required to be replaced for processing, first, the telescopic rod (22) is pulled out to drive the four hinge rods (28) to form a support to support the cold rolling roller bearing seat (10), and then the handle on the driving gear (23) is rotated to drive the driving gear (23) to rotate, and the four driven gears (24) are coupled to drive the worm wheel (26) to rotate, thereby driving the worm (25) to move, and then the worm (25) drives the driving roller bearing seat (5) to be pulled out of the second frame, and the processed seamless steel pipe (11) is taken out, and then the seamless steel pipe to be processed is loaded into the driving roller (13). Finally, the handle on the driving gear (23) is rotated in the opposite direction to install the driving roller bearing seat (5) back to the second frame, and the seamless steel pipe replacement operation is completed.

Images