A polycrystalline diamond radial bearing for rotary guide tool and its manufacturing process

Abstract

The present invention provides a polycrystalline diamond radial bearing for a rotary guide tool and a manufacturing process thereof, and relates to the technical field of bearings. The polycrystalline diamond radial bearing for a rotary guide tool comprises an outer ring, an inner ring and a vertical rod, wherein the inner ring is arranged in the middle of the outer ring and is arranged at intervals, the inner wall of the outer ring is provided with a plurality of first diamond composite sheets in an annular shape, the outer wall of the inner ring is provided with a plurality of second diamond composite sheets in an annular shape, and the outer sides of the plurality of first diamond composite sheets and second diamond composite sheets are provided with a casing sleeve, and the side walls of the two adjacent casing sleeves are fixedly connected with a connecting plate, and the outer sides of the two connecting plates are fixedly connected with a connecting block, and the side walls of the two connecting blocks are respectively fixedly connected with the side walls of the two adjacent casing sleeves, and the side walls of the connecting plates are provided with a mounting rod. Through the above structure, it is convenient to disassemble a single casing sleeve, and it is more convenient to replace the casing sleeve, thereby ensuring work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to a polycrystalline diamond-encrusted radial bearing for a rotary guide tool and a manufacturing process thereof. Background Art

[0002] The full name of diamond bearing is polycrystalline diamond bearing, referred to as PCD bearing. In diamond bearing, because it is inlaid with polycrystalline diamond composite sheets, some people also call it PDC bearing. Whether it is PCD bearing or PDC bearing, it is the same diamond bearing. During its operation, the formed cross-section of each diamond composite sheet installed on a pair of friction pairs acts as a positive and negative friction element, and performs relative rotational motion, thus realizing the function of ordinary sliding bearings. The diamond composite sheet in the PCD bearing is sintered under high temperature and high pressure using selected diamond powder and tungsten carbide composite. It has the high hardness, high wear resistance, high thermal conductivity, and corrosion resistance of diamond, as well as the strength and impact toughness of cemented carbide.

[0003] When applying for the present invention, after searching, it was found that a Chinese patent disclosed a "diamond polycrystal thrust bearing" with an application number of "201720927899.0". This patent mainly utilizes the wear resistance and high temperature resistance of diamond polycrystals. The structure and size design improve the impact toughness of diamond polycrystals, thereby ensuring the use effect of the bearing and extending the service life of the drill bit. However, when replacing the embedded sleeve, the entire bearing needs to be disassembled, which is troublesome during replacement and affects work efficiency. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a polycrystalline diamond radial bearing for a rotary guide tool and a manufacturing process thereof, which solves the problem of low working efficiency when replacing the embedded sleeve.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a polycrystalline diamond radial bearing for rotary guide tools and a manufacturing process thereof, comprising an outer ring, an inner ring and a vertical rod, the inner ring is arranged in the middle of the outer ring and is arranged at intervals, a plurality of first diamond composite sheets are arranged in an annular shape on the inner wall of the outer ring, a plurality of second diamond composite sheets are arranged in an annular shape on the outer wall of the inner ring, an encapsulated sleeve is arranged on the outer side of the plurality of first diamond composite sheets and second diamond composite sheets, two adjacent side walls of the encapsulated sleeve are fixedly connected with a connecting plate, two connecting plates are fixedly connected with connecting blocks on the outer side, two side walls of the connecting blocks are fixedly connected with the side walls of the adjacent two encapsulated sleeves, the side walls of the connecting plates are provided with mounting rods, one end of the mounting rods passes through the side wall of the connecting block and extends to the inside;

[0008] The outer ring and the inner ring side walls are provided with a first cover plate, the side wall between the outer ring and the inner ring is provided with a second cover plate, a plurality of blocks are provided in a ring shape on the outer side of the second cover plate, the outer ring and the inner ring side walls are respectively installed with a first card plate and a second card plate, a plurality of card grooves are provided on the side walls where the first card plate and the second card plate are connected to the second cover plate, and a plurality of plug holes are provided through the middle of the outer ring and the inner ring.

[0009] Preferably, two sliding rods are fixedly connected to the inner wall of the connecting block, and the outer walls of the two sliding rods are slidably connected to sliders, both sides of the sliders are fixedly connected to movable rods, one end of the movable rod is fixedly connected to a protrusion, and one end of the protrusion extends to the interior through the side wall of the mounting rod.

[0010] Preferably, a cavity is opened in the middle of the mounting rod, a spring is arranged on the outside of the sliding rod, one end of the spring is fixedly connected to the side wall of the slider, a positioning rod is arranged in the middle of the connecting block, both ends of the positioning rod pass through the movable rod and the middle of the sliding rod respectively, and a mounting plate is fixedly connected to the front end of the sliding rod, and the side wall of the mounting plate is in contact with the side wall of the mounting rod.

[0011] Preferably, the first cover plate side wall is annularly fixedly connected with a plurality of sleeves, the front ends of the plurality of sleeves are provided with screw holes, and the front ends of the plurality of sleeves are inserted into the inside of the socket.

[0012] Preferably, the side walls of the first clamping plate and the second clamping plate are both annularly fixedly connected with a plurality of insertion rods, the middle parts of the plurality of insertion rods are threadedly connected with a first threaded rod, the front ends of the plurality of first threaded rods pass through the interior of the insertion hole and are threadedly connected with the interior of the sleeve, nuts are provided on the outer sides of the first clamping plate and the second clamping plate, and the side walls of the nuts are fixedly connected to the ends of the first threaded rods.

[0013] Preferably, the inner wall of the vertical rod is rotatably connected to a second threaded rod, the outer surface of the second threaded rod is threadably connected to two threaded blocks, connecting pieces are provided on both sides of the two threaded blocks and the inner wall of the vertical rod, and the side walls of the connecting pieces are cross-rotatably connected to push rods.

[0014] Preferably, the side walls of the connecting piece inside the vertical rod are provided with push blocks, the upper end of the vertical rod is installed with a knob, and the side walls of the knob are fixedly connected to the upper end of the second threaded rod.

[0015] Preferably, the manufacturing process of the bearing comprises the following steps:

[0016] S1. Manufacturing of inner and outer rings of bearings: Select high-quality steel and cut the steel, then heat and punch holes. The hole in the middle of the inner ring is smaller than that of the outer ring. Then anneal and pickle.

[0017] A. Hot forging process: steel bar preparation → medium frequency induction heating → bar shearing → material segment upsetting → inner and outer ring separation → outer ring rolling → outer ring shaping → inner ring upsetting → inner ring extrusion → inner ring bottom cutting → annealing → inspection;

[0018] B. Precision forging process: Use a lathe to grind the inner and outer walls of the inner and outer rings, grind the edges and corners of the inner and outer rings to form chamfers, and inspect the outer and inner rings after grinding.

[0019] S2. Drilling: Drill holes of the same size and depth on the inner wall of the outer ring and the outer side of the inner ring to facilitate the installation of polycrystalline diamond;

[0020] S3, welding: welding the polycrystalline diamond by plasma transferred arc cladding, and installing the polycrystalline diamond inside the hole in step S2;

[0021] S4. Welding point treatment: Use ultrasonic waves to detect the inner and outer rings. If welding leaks occur, repair them in time. If there are burrs, grind them in time.

[0022] (III) Beneficial effects

[0023] The present invention provides a polycrystalline diamond radial bearing for a rotary guide tool and a manufacturing process thereof. It has the following beneficial effects:

[0024] 1. The present invention cooperates with a vertical rod, a sliding rod, a slider, a movable rod and a convex block, and cooperates with the inside of a mounting rod and a connecting block to install two adjacent encapsulation sleeves, so that the diamond composite sheet can be wrapped. When replacing, the vertical rod is inserted into the inside of the mounting rod, and the two second threaded rods are moved toward each other by rotating the second threaded rod, so that the push block pushes the convex block to move, thereby disassembling a single encapsulation sleeve. The operation is relatively convenient and simple, and it is easy to replace the encapsulation sleeve.

[0025] 2. The present invention cooperates with the first clamp, the second clamp, the first cover and the second cover, and the second clamp can be positioned after the inner ring and the outer ring are fitted together by the first clamp and the second clamp. The first threaded rod cooperates with the screw hole to position and install the first cover and the second cover, and it is relatively simple to disassemble.

[0026] 3. The present invention can protect the diamond composite sheets by installing the encapsulation sleeves on the outside of two adjacent diamond composite sheets, and when disassembling, only the damaged diamond composite sheet needs to be disassembled, which is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0028] Figure 2 It is a side view schematic diagram of the present invention;

[0029] Figure 3 It is a semi-sectional schematic diagram of the present invention;

[0030] Figure 4 It is a front cross-sectional schematic diagram of the encapsulated sleeve of the present invention;

[0031] Figure 5 For the present invention Figure 4 The enlarged schematic diagram of point A in the middle;

[0032] Figure 6 It is a schematic cross-sectional view of the vertical rod of the present invention.

[0033] Among them, 1. outer ring; 2. inner ring; 3. first diamond composite sheet; 4. second diamond composite sheet; 5. inlaid sleeve; 6. first cover plate; 7. second cover plate; 8. sleeve; 9. screw hole; 10. jack; 11. first threaded rod; 12. plug rod; 13. nut; 14. first clamping plate; 15. second clamping plate; 16. clamping groove; 17. clamping block; 18. connecting block; 19. positioning rod; 20. bump; 21. mounting plate; 22. mounting rod; 23. sliding rod; 24. cavity; 25. connecting plate; 26. movable rod; 27. spring; 28. slider; 29. ​​knob; 30. threaded block; 31. second threaded rod; 32. push rod; 33. connecting piece; 34. vertical rod; 35. push block. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example:

[0036] like Figure 1-6 As shown, an embodiment of the present invention provides a polycrystalline diamond radial bearing for a rotary guide tool and a manufacturing process thereof, comprising an outer ring 1, an inner ring 2 and a vertical rod 34, wherein the inner ring 2 is arranged in the middle of the outer ring 1 and is arranged at intervals, a plurality of first diamond composite sheets 3 are arranged in an annular shape on the inner wall of the outer ring 1, a plurality of second diamond composite sheets 4 are arranged in an annular shape on the outer wall of the inner ring 2, the first diamond composite sheets 3 and the second diamond composite sheets 4 are fitted to each other, and the holes on the inner wall of the outer ring 1 and the outer wall of the inner ring 2 are consistent in size with the first diamond composite sheets 3 and the second diamond composite sheets 4, and the outer sides of the plurality of first diamond composite sheets 3 and the second diamond composite sheets 4 are both provided with polycrystalline diamond composite sheets 4. The sleeve 5 is used to wrap the diamond composite sheet. In the powder metallurgy sintering process of the metal-based diamond composite material, the carbide coating can effectively improve the holding force of the matrix on the diamond, thereby improving the interface bonding state between the matrix and the diamond, improving the processing efficiency, and extending the service life of the diamond tool. The side walls of the two adjacent encapsulated sleeves 5 are fixedly connected with a connecting plate 25, and the outer sides of the two connecting plates 25 are fixedly connected with a connecting block 18. The side walls of the two connecting blocks 18 are respectively fixedly connected to the side walls of the two adjacent encapsulated sleeves 5. The side walls of the connecting plates 25 are provided with mounting rods 22, and one end of the mounting rods 22 passes through the side wall of the connecting block 18 and extends to the inside, such as Figure 5 The upper connecting plate 25 is fixedly connected to the right side of the embedded sleeve 5, and the upper connecting block 18 is fixedly connected to the side wall of the left side of the embedded sleeve 5. The lower connecting plate 25 and the connecting block 18 are fixedly connected opposite to them, so as to facilitate the engagement of the two embedded sleeves 5.

[0037] A first cover plate 6 is provided on the side walls of the outer ring 1 and the inner ring 2, a second cover plate 7 is provided on the side wall between the outer ring 1 and the inner ring 2, a plurality of clamping blocks 17 are provided in a ring shape on the outer side of the second cover plate 7, the clamping blocks 17 cooperate with the clamping grooves 16 to facilitate the positioning of the second cover plate 7, a first clamping plate 14 and a second clamping plate 15 are respectively installed on the side walls of the outer ring 1 and the inner ring 2, a plurality of clamping grooves 16 are provided on the side walls at the connection between the first clamping plate 14 and the second clamping plate 15 and the second cover plate 7, and a plurality of jacks 10 are provided through the middle of the outer ring 1 and the inner ring 2.

[0038] Two slide bars 23 are fixedly connected to the inner wall of the connecting block 18, and the outer walls of the two slide bars 23 are slidably connected with sliders 28. Both sides of the sliders 28 are fixedly connected with movable bars 26, and one end of the movable bar 26 is fixedly connected with a protrusion 20. The protrusion 20 cooperates with the inside of the mounting rod 22 to position the mounting rod 22. One end of the protrusion 20 passes through the side wall of the mounting rod 22 and extends to the inside. A cavity 24 is opened in the middle of the mounting rod 22. A spring 27 is arranged on the outside of the slide bar 23. The spring 27 is used to elastically push the movable bar 26 to move. One end of the spring 27 is fixedly connected to the side wall of the slider 28. The middle of the connecting block 18 A positioning rod 19 is provided to position the movable rod 26 to prevent the movable rod 26 from loosening, and the outer side of the positioning rod 19 is slidably connected to the inner wall of the second cover plate 7, and the second cover plate 7 can position the positioning rod 19 to prevent the positioning rod 19 from falling. The two ends of the positioning rod 19 pass through the movable rod 26 and the middle of the slide bar 23 respectively, and the front end of the slide bar 23 is fixedly connected with a mounting plate 21, and the side wall of the mounting plate 21 is fitted with the side wall of the mounting rod 22. The side wall of the first cover plate 6 is annularly fixedly connected with multiple sleeves 8, and the front ends of the multiple sleeves 8 are all provided with screw holes 9, which are connected to the first threaded rod 11. To facilitate the connection of the first cover plate 6, the second cover plate 7, the first clamping plate 14 and the second clamping plate 15 with the inner ring 2 and the outer ring 1, the front ends of the plurality of sleeves 8 are inserted into the inside of the jack 10, the side walls of the first clamping plate 14 and the second clamping plate 15 are annularly fixedly connected with a plurality of plug rods 12, the middle parts of the plurality of plug rods 12 are threadedly connected with the first threaded rod 11, the front ends of the plurality of first threaded rods 11 pass through the inside of the jack 10 and are threadedly connected with the inside of the sleeve 8, the outer sides of the first clamping plate 14 and the second clamping plate 15 are provided with nuts 13, the side walls of the nuts 13 are fixedly connected with the ends of the first threaded rods 11, and the inner walls of the vertical rods 34 are rotatably connected There is a second threaded rod 31, and the external threads of the second threaded rod 31 are symmetrically arranged so that the two threaded blocks 30 can move toward each other. The external threads of the second threaded rod 31 are connected to the two threaded blocks 30. Connectors 33 are arranged on both sides of the two threaded blocks 30 and on the inner walls of the vertical rod 34. The side walls of the connecting members 33 are cross-rotatably connected with push rods 32. Push blocks 35 are arranged on the side walls of the connecting members 33 inside the vertical rod 34. The push blocks 35 are slidably connected inside the vertical rod 34 so that the push rod 32 can push the push blocks 35 to move. A knob 29 is installed on the upper end of the vertical rod 34, and the side walls of the knob 29 are fixedly connected to the upper end of the second threaded rod 31.

[0039] The manufacturing process of the bearing comprises the following steps;

[0040] S1. Manufacturing of bearing inner ring 2 and outer ring 1: Select high-quality steel and cut the material, then heat and punch holes. The middle hole of inner ring 2 is smaller than that of outer ring 1. Annealing is performed and pickling is performed at last.

[0041] A. Hot forging process: steel bar preparation → medium frequency induction heating → bar shearing → material segment upsetting → inner and outer ring 1 separation → outer ring 1 ring rolling → outer ring 1 shaping → inner ring 2 upsetting → inner ring 2 extrusion → inner ring 2 bottom cutting → annealing → inspection;

[0042] B. Precision forging process: Use a lathe to grind the inner and outer walls of the inner ring 2 and the outer ring 1, grind the corners of the inner ring 2 and the outer ring 1 to form chamfers, and inspect the outer ring 1 and the inner ring 2 after grinding.

[0043] S2, drilling: drilling holes of the same size and depth on the inner wall of the outer ring 1 and the outer side of the inner ring 2 to facilitate the installation of polycrystalline diamond;

[0044] S3, welding: welding the polycrystalline diamond by plasma transferred arc cladding, and installing the polycrystalline diamond inside the hole in step S2;

[0045] S4. Welding point treatment: Use ultrasonic waves to detect the inner ring 2 and the outer ring 1. If there is welding leakage, repair it in time. If there are burrs, grind it in time.

[0046] Working principle: When in use, the first diamond composite sheet 3 and the second diamond composite sheet 4 are respectively installed in the holes of the inner wall of the outer ring 1 and the outer wall of the inner ring 2, the first diamond composite sheet 3 and the second diamond composite sheet 4 are in contact with each other, and the inlay sleeve 5 is installed on the outside of the first diamond composite sheet 3 and the second diamond composite sheet 4, and the connecting plate 25 and the connecting block 18 are used to cooperate to install and position the two adjacent inlay sleeves 5, and the installation rod 22 is inserted into the interior of the connecting block 18, and the elasticity of the spring 27 is used to push the slider 28 to move, so that the movable rod 26 pushes the protrusion 20 into the interior of the installation rod 22 during the movement, thereby positioning the installation rod 22, and finally the positioning rod 19 is inserted into the interior of the connecting block 18, and passes through the middle of the movable rod 26 and the sliding rod 23 in turn, and the lower end extends to the inner bottom of the connecting block 18;

[0047] like Figure 1 As shown, the first cover plate 6 is installed on the left side of the inner ring 2 and the outer ring 1, and the sleeve 8 is inserted into the inside of the socket 10, and the second cover plate 7 is installed between the outer ring 1 and the inner ring 2 (on the right side), and then the first clamping plate 14 and the second clamping plate 15 are installed in sequence, and the clamping block 17 is matched with the clamping groove 16, the insertion rod 12 is inserted into the inside of the socket 10, and the nut 13 is rotated by a wrench, and the first threaded rod 11 is extended to the inside of the screw hole 9 during the rotation process, so as to position the second cover plate 7, and the same method is used for disassembly;

[0048] When disassembling the embedding sleeve 5, take out the positioning rod 19, extend the vertical rod 34 through the side wall of the connecting block 18 to the inside of the mounting rod 22, and use the knob 29 to drive the second threaded rod 31 to rotate, so that the two threaded blocks 30 move toward each other. During the movement, with the cooperation of the connecting member 33, the push rod 32 pushes the push block 35 to move, thereby pushing the protrusion 20 out of the inside of the mounting rod 22, so that the embedding sleeve 5 is disassembled, and a single embedding sleeve 5 can be replaced.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polycrystalline diamond radial bearing for a rotary guide tool, comprising an outer ring (1), an inner ring (2) and a vertical rod (34), characterized in that: The inner ring (2) is arranged in the middle of the outer ring (1) and is arranged at intervals. The inner wall of the outer ring (1) is provided with a plurality of first diamond composite sheets (3) in an annular shape. The outer wall of the inner ring (2) is provided with a plurality of second diamond composite sheets (4) in an annular shape. The outer sides of the plurality of first diamond composite sheets (3) and second diamond composite sheets (4) are provided with enveloping sleeves (5). The side walls of two adjacent enveloping sleeves (5) are fixedly connected with connecting plates (25). The outer sides of the two connecting plates (25) are fixedly connected with connecting blocks (18). The side walls of the two connecting blocks (18) are respectively fixedly connected with the side walls of the two adjacent enveloping sleeves (5). The side walls of the connecting plates (25) are provided with mounting rods (22). One end of the mounting rods (22) passes through the side wall of the connecting block (18) and extends to the inside. The side walls of the outer ring (1) and the inner ring (2) are provided with a first cover plate (6), the side wall between the outer ring (1) and the inner ring (2) is provided with a second cover plate (7), the outer side of the second cover plate (7) is provided with a plurality of card blocks (17) in an annular shape, the side walls of the outer ring (1) and the inner ring (2) are respectively provided with a first card plate (14) and a second card plate (15), a plurality of card grooves (16) are provided on the side walls where the first card plate (14) and the second card plate (15) are connected to the second cover plate (7), and a plurality of insertion holes (10) are provided through the middle of the outer ring (1) and the inner ring (2).

2. The polycrystalline diamond radial bearing for a rotary guide tool according to claim 1, characterized in that: The inner wall of the connecting block (18) is fixedly connected to two sliding rods (23), and the outer walls of the two sliding rods (23) are slidably connected to sliders (28). Both sides of the sliders (28) are fixedly connected to movable rods (26), and one end of the movable rod (26) is fixedly connected to a protrusion (20), and one end of the protrusion (20) passes through the side wall of the mounting rod (22) and extends to the inside.

3. The polycrystalline diamond radial bearing for a rotary guide tool according to claim 2, characterized in that: A cavity (24) is provided in the middle of the mounting rod (22); a spring (27) is provided on the outside of the slide rod (23); one end of the spring (27) is fixedly connected to the side wall of the slide block (28); a positioning rod (19) is provided in the middle of the connecting block (18); two ends of the positioning rod (19) pass through the movable rod (26) and the middle of the slide rod (23) respectively; a mounting plate (21) is fixedly connected to the front end of the slide rod (23); and the side wall of the mounting plate (21) is in contact with the side wall of the mounting rod (22).

4. The polycrystalline diamond radial bearing for a rotary guide tool according to claim 1, characterized in that: The first cover plate (6) has a ring-shaped side wall fixedly connected to a plurality of sleeves (8), the front ends of the plurality of sleeves (8) are all provided with screw holes (9), and the front ends of the plurality of sleeves (8) are all inserted into the interior of the insertion holes (10).

5. The polycrystalline diamond radial bearing for a rotary guide tool according to claim 1, characterized in that: The side walls of the first clamping plate (14) and the second clamping plate (15) are both annularly fixedly connected with a plurality of insertion rods (12), the middle parts of the plurality of insertion rods (12) are threadedly connected with a first threaded rod (11), the front ends of the plurality of first threaded rods (11) pass through the interior of the insertion hole (10) and are threadedly connected with the interior of the sleeve (8), the outer sides of the first clamping plate (14) and the second clamping plate (15) are both provided with nuts (13), and the side walls of the nuts (13) are fixedly connected with the ends of the first threaded rods (11).

6. The polycrystalline diamond radial bearing for a rotary guide tool according to claim 1, characterized in that: The inner wall of the vertical rod (34) is rotatably connected to a second threaded rod (31), and the outer surface of the second threaded rod (31) is threadably connected to two threaded blocks (30). Connecting pieces (33) are provided on both sides of the two threaded blocks (30) and the inner wall of the vertical rod (34), and the side walls of the connecting pieces (33) are cross-rotatably connected to a push rod (32).

7. The polycrystalline diamond radial bearing for a rotary guide tool according to claim 1, characterized in that: The side walls of the connecting member (33) inside the vertical rod (34) are each provided with a push block (35), the upper end of the vertical rod (34) is provided with a knob (29), and the side wall of the knob (29) is fixedly connected to the upper end of the second threaded rod (31).

8. The manufacturing process of a polycrystalline diamond radial bearing for a rotary guide tool according to claim 1, characterized in that: The steps include: S1. Manufacturing of the inner ring (2) and the outer ring (1) of the bearing: Select high-quality steel and cut the steel, then heat and punch holes, the middle hole of the inner ring (2) is smaller than the hole of the outer ring (1), annealing is performed, and finally pickling is performed; A. Hot forging process: steel bar preparation → medium frequency induction heating → bar shearing → material segment upsetting → inner and outer ring separation → outer ring (1) ring rolling → outer ring (1) shaping → inner ring (2) upsetting → inner ring (2) extrusion → inner ring (2) bottom cutting → annealing → inspection; B. Precision forging process: Use a lathe to grind the inner and outer walls of the inner ring (2) and the outer ring (1), grind the edges and corners of the inner ring (2) and the outer ring (1) to form chamfers, and inspect the outer ring (1) and the inner ring (2) after grinding. S2, drilling: drilling holes of the same size and depth on the inner wall of the outer ring (1) and the outer side of the inner ring (2) to facilitate the installation of polycrystalline diamond; S3, welding: welding the polycrystalline diamond by plasma transferred arc cladding, and installing the polycrystalline diamond inside the hole in step S2; S4. Welding spot treatment: Use ultrasonic waves to inspect the inner ring (2) and the outer ring (1). If welding leaks occur, repair them in time. If there are burrs, grind them in time.

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