CN115853905A - Processing technology of wide-temperature-range low-temperature-profile outer ring self-lubricating joint bearing - Google Patents
Processing technology of wide-temperature-range low-temperature-profile outer ring self-lubricating joint bearing Download PDFInfo
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Abstract
The invention relates to a processing technology of a wide-temperature-range low-temperature split outer ring self-lubricating spherical plain bearing. By adopting the invention, the processing precision of the bearing and the matching rate of the bearing are improved by reasonably arranging the processing flow of the bearing ring; the two double-half outer rings are fixed together through the technical locking ring, so that the problems that the outer diameter and the spherical size precision of the split outer ring are not easy to guarantee, the grouping rate is low and the like are solved, and the problems that the outer ring locking ring groove is not round, the outer diameter and the spherical size precision of the split outer ring are poor and the like caused by material loss caused by process reasons are solved; the process locking ring and the disassembling tool are combined, so that the disassembling efficiency of the fit split outer ring is improved, and the outer ring is prevented from being damaged when the locking ring is disassembled; through the design of bearing assembly fixture, the problems of difficulty in positioning and easiness in crushing a bearing or a lock ring are solved, the production efficiency is improved, and the labor intensity of workers is reduced.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to a processing technology of a wide-temperature-range low-temperature profile type outer ring self-lubricating knuckle bearing.
Background
The joint bearing is a sliding bearing consisting of an outer ring with an inner spherical surface and an inner ring with an outer spherical surface. The structure of the outer ring can be divided into a single-slit type, a split type, a double-half type, an extrusion type and an assembly groove type. And are commonly used for oscillating, tilting and rotating movements at low speeds.
In order to meet the requirements of special working conditions (working conditions of low speed, heavy load, ultralow temperature, wide temperature range and self lubrication), the bearing ring material is made of precipitation type martensitic stainless steel with high low-temperature impact energy, the material is 022Cr12Ni10MoTi, and because the hardness is low (32 to 35HRC), an outer ring single-slit type cannot be adopted, and the material cannot be adopted in a successful case of outer ring extrusion type. Meanwhile, the outer ring belt assembling groove type cannot be adopted due to the limitation of heavy-load working conditions. And the size of part of the bearings is limited, so that the part of the bearings adopts an outer ring split structure, lock ring grooves are arranged on the end faces of two sides of the outer ring, and each lock ring groove is in interference fit with one lock ring.
The existing processing technology of the split outer ring knuckle bearing usually adopts a mode of processing and matching a single half outer ring after the outer ring is split, or a mode of processing a combined body after rough grinding; the outer ring outer diameter and the spherical surface size precision of the first process are not easy to guarantee, the grouping rate is low, the bearing precision is not high, and the first process is not suitable for high-precision and large-batch production and processing; the second process is adopted, the second process comprises the working procedures of turning, heat treatment, coarse grinding, subdivision and final grinding, the outer ring lock ring groove is out of round due to material loss caused by the working procedure reasons, the size precision of the outer diameter and the spherical surface of the subdivided outer ring is poor, and meanwhile, because the common lock ring and the lock ring groove are in interference fit, the disassembly difficulty is high, the efficiency is low, and outer ring parts are easily damaged. Therefore, it is very necessary to research a processing technology of the wide-temperature-range low-temperature-profile outer ring self-lubricating knuckle bearing.
Disclosure of Invention
The invention aims to provide a processing technology of a wide-temperature-range low-temperature split outer ring self-lubricating spherical plain bearing, aiming at the problems that in the background technology, the processing of the wide-temperature-range low-temperature spherical plain bearing is low in processing precision, low in bearing matching rate, not suitable for mass production, high in disassembly difficulty, easy to damage parts and the like.
In order to realize the purpose, the invention provides the following technical scheme: a wide-temperature-range low-temperature split outer ring self-lubricating spherical plain bearing processing technology comprises an inner ring (02) and an outer ring processing flow of a bearing, a bearing split outer ring integrated processing method, a bearing split outer ring integrated splitting method and a bearing lock ring assembling method, and is characterized in that:
the processing flow of the bearing outer ring comprises the following steps: blank sawing, cutting, heat treatment, rough turning and forming, -196 ℃ deep cooling treatment, wire cutting and splitting of the outer ring, identification of the split outer ring in pairs, finish turning of the outer diameter, finish turning of a locking ring groove at one side, assembly of a process locking ring (05) at one side, finish turning of a locking ring groove at the other side, assembly of a process locking ring (05) at the other side, initial grinding of two end surfaces, initial grinding of the outer diameter, finish turning of a spherical surface, additional tempering, final grinding of two end surfaces, final grinding of the outer diameter, final grinding of the spherical surface, magnetic powder inspection, grinding of the outer diameter, laser identification, removal of the process locking ring (05), and spherical surface pasting of a PTFE fabric liner (03);
the processing flow of the bearing inner ring (02) comprises the following steps: blank sawing, cutting, heat treatment, rough turning and forming, subzero treatment at-196 ℃, primary grinding of two end faces, primary grinding of a spherical surface, primary grinding of an inner diameter, additional tempering, final grinding of two end faces, laser identification, final grinding of a spherical surface (matched grinding according to the size of the spherical surface of an outer ring and the requirement of radial play), final grinding of an inner diameter, magnetic powder inspection, super-precision spherical surface, chromium plating of the spherical surface and super-precision chromium plating layer;
the processing method of the bearing split outer ring assembly comprises the following steps: clamping two split semi-outer rings (01) by using a three-jaw chuck on a high-precision numerical control lathe, finish turning a lock ring groove on one side end face by taking an outer diameter surface as a reference after finishing an outer diameter working procedure, then assembling a process lock ring (05), and repeating the two working procedures after one side is finished to enable the two semi-outer rings (01) to be combined into an outer ring;
the method for splitting the bearing after splitting the outer ring into the combined body comprises the following steps: firstly, putting the integrated bearing outer ring into a technological lock ring disassembling tool (06), screwing a tightening bolt in a tightening threaded hole (062) to fix the integrated bearing outer ring, then installing a T-shaped positioning block through a positioning block threaded hole (063) of the disassembling tool (06) to fix the T-shaped positioning block on a workbench, and finally disassembling the technological lock ring (05) by using a mechanical puller (07);
the assembling method of the bearing lock ring (04) comprises the following steps: and (2) placing the bearing (09) which is subjected to sleeve combination into the guide sleeve (10), positioning the bearing (09) through a mandrel in the middle of the guide sleeve (10), then placing the lock ring (04) into the punch (11) to align with the lock ring groove on the end face of the bearing, and finally pressing down the press to press the lock ring (04) into the guide sleeve to complete the assembly of the bearing (09). The processing technology of the wide-temperature-range low-temperature-profile outer ring self-lubricating knuckle bearing is characterized by comprising the following steps of: two rectangular technological lock ring disassembling grooves (051) are formed in the technological lock ring (05) along the center line.
The processing technology of the wide-temperature-range low-temperature-profile outer ring self-lubricating knuckle bearing is characterized by comprising the following steps of: the material of the technical lock ring (05) is spring steel with the mark of 65Mn.
The processing technology of the wide-temperature-range low-temperature split outer ring self-lubricating knuckle bearing is characterized by comprising the following steps of: one side of the disassembling tool (06) is provided with a cutting seam (061) along the central line, and two surfaces of the cutting seam (061) are provided with elastic threaded holes (062).
By adopting the invention, the problem caused by complex structure and process of the wide-temperature-range low-temperature joint bearing is solved by reasonably arranging the processing flow of the bearing ring, and the processing precision and the bearing matching rate of the bearing are improved. The two double-half outer rings (01) are fixed together by the process locking ring (05), so that the consistency of the outer diameter of the split outer ring, the outer ring locking ring groove and the spherical size in the subsequent outer ring grinding process can be ensured, the problems that the outer diameter of the split outer ring and the spherical size precision of the bearing are not easy to ensure, the grouping rate is low, the bearing precision is not high and the like caused by the process of matching after the single half outer ring is processed are solved, and the problems that the outer ring locking ring groove is not round, the outer diameter of the split outer ring and the spherical size precision are poor and the like caused by material loss caused by the process when another process (turning, heat treatment, coarse grinding, splitting and final grinding) is adopted are avoided. The process locking ring and the disassembling tool are combined, so that the disassembling efficiency of the fit split outer ring is improved, and the problem that the outer ring is easily damaged when the common locking ring is adopted for disassembling is avoided. Through the design of bearing assembly fixture, the problems of difficulty in positioning and easiness in crushing a bearing or a lock ring are solved, the production efficiency is improved, and the labor intensity of workers is reduced.
Drawings
Fig. 1 is a sectional view of a split type self-lubricating spherical plain bearing of the present invention.
FIG. 2 is a schematic view of the disassembly of the locking collar of the present invention.
Fig. 3 is a view of the inventive process collar.
FIG. 4 is a C-C cross-sectional view of the process locking collar of the present invention.
FIG. 5 is a view of the technological lock ring disassembling tool of the invention.
FIG. 6 is a B-B cross-sectional view of the process lock ring disassembling tool of the invention.
FIG. 7 is a schematic view of the bearing assembly of the present invention.
In the drawing, 01, a half outer ring, 02, an inner ring, 03, a PTFE fabric liner, 04, a lock ring, 05, a process lock ring, 06, a process lock ring disassembling tool, 07, a mechanical puller, 08, a combined split outer ring, 09, a bearing, 10, an assembling guide sleeve, 11, an assembling punch, 051, a process lock ring disassembling groove, 061, a cutting seam, 062, an elastic threaded hole, 063 and a positioning block threaded hole are arranged.
Detailed Description
The technical solutions in the embodiments of the present invention will be fully described below with reference to the accompanying drawings in the embodiments of the present invention, and the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a first embodiment, referring to fig. 1, the split outer ring self-lubricating spherical plain bearing (09) in the wide-temperature-range low-temperature split outer ring self-lubricating spherical plain bearing processing technology comprises a half outer ring (01), an inner ring (02), a PTFE fabric liner (03) and a lock ring (04), and the technology comprises a bearing inner ring (02) and outer ring processing flow, a bearing split outer ring integrated processing method, a bearing split outer ring integrated splitting method and a bearing lock ring assembling method, which are specifically as follows.
1. The processing flow of the bearing outer ring comprises the following working procedures.
1. Cutting a blank by sawing and sleeving: an E51 numerical control lathe is adopted, the rotating speed of a main shaft ranges from 200 to 500r/min, and the feeding amount ranges from 0.1 to 0.3mm/r.
2. And (3) heat treatment: and (3) adopting a medium-frequency quenching furnace, keeping the temperature at 750 ℃ for 4h, and performing water quenching.
3. Rough turning and forming: an E51 numerical control lathe is adopted, the rotating speed of a main shaft is kept at 300 to 600r/min, and the feeding amount is kept at 0.1 to 0.3mm/r.
4. Cryogenic treatment at-196 ℃: adopting a DJL-SLX987C deep cooling box, keeping the temperature at-196 ℃ and the time at 2h.
5. Wire cutting and outer ring splitting: and (3) adopting a DK7725 numerical control wire cut electric discharge machine to keep the wire running speed within 0.1-0.2m/s.
6. And (3) splitting outer ring marks in pairs: and (3) adopting an MOPA laser marking machine, wherein the depth is 5 to 8 mu m.
7. Finish turning of the outer diameter: and (3) adopting an E51 numerical control lathe, and keeping the rotating speed of the main shaft to be 500-800r/min and the feed amount to be 0.1-0.3mm/r.
8. Finish turning a lock ring groove on one side: an E51 numerical control lathe is adopted, the rotating speed of a main shaft is kept at 500 to 800r/min, and the feed rate is 0.1 to 0.3mm/r.
9. Assembling a side process locking ring (05): and (4) assembling by manual work.
10. Finish turning the lock ring groove on the other side: an E51 numerical control lathe is adopted, the rotating speed of a main shaft is kept at 500 to 800r/min, and the feed rate is 0.1 to 0.3mm/r.
11. Assembling the other side process locking ring (05): and assembling by manual work.
12. Primarily grinding two end faces: and (3) adopting an M7675 double-ended grinding machine, and keeping the rotating speed of the grinding wheel at 300-760 r/min and the feed quantity at 0.2-0.3 mm/min.
13. Primary grinding of the outer diameter: and (3) adopting a 3MZ216 external diameter grinding machine, and keeping the rotating speed of the grinding wheel to be 1200-1500 r/min, the rotating speed of the workpiece to be 60-120 r/min and the feed quantity to be 0.2-0.3 mm/min.
14. Finish turning of a spherical surface: and (3) adopting an E51 numerical control lathe, and keeping the rotating speed of the main shaft to be 500-800r/min and the feed amount to be 0.1-0.3mm/r.
15. Additional tempering: and (3) adopting a low-temperature oven furnace, keeping the temperature at 160 +/-5 ℃ and keeping the time at 3 to 4 hours.
16. And (3) final grinding of two end faces: and (3) keeping the rotation speed of the grinding wheel at 300 to 760r/min by adopting an M7675 double-ended grinding machine, wherein the feed rate is 0.08 to 0.15mm/min.
17. Final grinding of the outer diameter: a3 MZ216 external diameter grinding machine is adopted, the rotation speed of a grinding wheel is kept at 1200 to 1500r/min, the rotation speed of a workpiece is kept at 60 to 120r/min, and the feed rate is kept at 0.08 to 0.15mm/min.
18. Final grinding of a spherical surface: and (3) adopting a 3MZ206 internal diameter grinding machine, and keeping the rotating speed of a grinding wheel at 8000-12000r/min, the rotating speed of a workpiece at 150-300r/min, and the feed rate at 0.08-0.15mm/min.
19. Magnetic powder inspection: a CJW-3000 type ferrule magnetic particle flaw detector is adopted, axial energization is carried out, the energization time is 1 to 3s, and the energization current is 700 to 800A.
20. Grinding the outer diameter: a3 MZ216 outer diameter grinding machine is adopted, the rotation speed of a grinding wheel is kept at 1200 to 1500r/min, the rotation speed of a workpiece is kept at 60 to 1200 r/min, and the feed rate is kept at 0.01 to 0.05mm/min.
21. Laser marking: and adopting an MOPA laser marking machine, wherein the marking depth is 5-8 mu m.
22. Dismantling the process locking ring (05): the disassembly tool is shown in figures 5 and 6.
23. Spherical adhesive PTFE fabric liner (03): curing after the liner is pasted by adopting a low-temperature oven for 2 hours at the temperature of 90 +/-5 ℃.
2. The processing flow of the bearing inner ring (02) comprises the following working procedures.
1. Cutting a blank by sawing and sleeving: and (3) adopting an E51 numerical control lathe, and keeping the rotating speed of the main shaft to be 200-500r/min and the feeding amount to be 0.1-0.3mm/r.
2. And (3) heat treatment: and (3) adopting a medium-frequency quenching furnace, keeping the temperature at 750 ℃ for 4h, and performing water quenching.
3. Rough turning and forming: and (3) adopting an E51 numerical control lathe, and keeping the rotating speed of the main shaft to be 300-600r/min and the feeding amount to be 0.1-0.3 mm/r.
4. Subzero treatment at the temperature of minus 196 ℃: adopting a DJL-SLX987C deep cooling box, and keeping the temperature at-196 ℃ for 2h.
5. Initially grinding two end faces: and (3) adopting an M7675 double-ended grinding machine, and keeping the rotation speed of the grinding wheel at 300-760 r/min and the feed amount at 0.2-0.3mm/min.
6. Initially grinding a spherical surface: a3 MZ216 outer diameter grinding machine is adopted, the rotation speed of a grinding wheel is kept at 1200 to 1500r/min, the rotation speed of a workpiece is kept at 60 to 120r/min, and the feed rate is kept at 0.2 to 0.3mm/min.
7. Initial grinding of the inner diameter: and (3) adopting a 3MZ206 internal diameter grinding machine, and keeping the rotating speed of a grinding wheel at 8000-12000r/min, the rotating speed of a workpiece at 150-300r/min, and the feed quantity at 0.2-0.3 mm/min.
8. Additional tempering: and (5) adopting a low-temperature oven, keeping the temperature at 160 +/-5 ℃ and keeping the time for 3-4 h.
9. And (3) final grinding of two end faces: and (3) adopting an M7675 double-ended grinding machine, and keeping the rotating speed of the grinding wheel at 300-760 r/min and the feed quantity at 0.08-0.15mm/min.
10. Laser marking: adopting an MOPA laser marking machine to mark the depth: 5 to 8 mu m.
11. Final grinding of a spherical surface: grinding according to the requirements of the spherical size and radial play of an outer ring, and keeping the rotating speed of a grinding wheel at 1200-1500 r/min, the rotating speed of a workpiece at 60-120r/min and the feed quantity at 0.08-0.15mm/min by adopting a 3MZ216 outer diameter grinding machine.
12. Final grinding inner diameter: and (3) adopting a 3MZ206 internal diameter grinding machine, and keeping the rotating speed of a grinding wheel at 8000-12000r/min, the rotating speed of a workpiece at 150-300r/min, and the feed quantity at 0.2-0.3 mm/min.
13. Magnetic powder inspection: a CJW-3000 type ferrule magnetic powder flaw detector is adopted, axial energization is carried out, the energization time is 1 to 3s, and the energization current is 500 to 600A.
14. Ultra-precision spherical surface: and (3) a spherical surface polishing machine is adopted, and the rotation speed of the main shaft is kept to be 200-300r/min, and the swing frequency is kept to be 0.3-0.5HZ.
15. Spherical surface chromium plating: keeping the temperature of the plating solution at 50-55 ℃ and the cathode current density at 30-60A/dm 2 。
16. Ultra-fine chromium plating layer: and (3) a spherical surface polishing machine is adopted, and the rotating speed of the main shaft is kept at 100-200r/min, and the swinging frequency is kept at 0.3-0.5HZ.
3. Provided is a method for processing a split outer ring assembly of a bearing.
Firstly, clamping two split semi-outer rings (01) by using a three-jaw chuck on a high-precision numerical control lathe, after finishing an outer diameter finish turning process, finish turning a lock ring groove on one side end face by taking an outer diameter face as a reference, then assembling a process lock ring (05), and after finishing one side, repeating the two processes to ensure that the two semi-outer rings (01) are combined into an outer ring.
4. A method for splitting a bearing after splitting an outer ring combination.
Referring to fig. 2, firstly, the integrated bearing outer ring is placed in a technological lock ring disassembling tool (06), the integrated bearing outer ring is fixed by screwing a tightening bolt in a tightening threaded hole (062), then a T-shaped positioning block is arranged on a threaded hole (063) of the disassembling tool (06) to be fixed on a workbench, and finally, the technological lock ring (05) is disassembled by using a mechanical puller (07).
5. A bearing lock ring (04) assembling method.
Referring to fig. 7, the bearing (09) which is completely sleeved is placed into the guide sleeve (10), the bearing (09) is positioned through the mandrel in the middle of the guide sleeve (10), then the locking ring (04) is placed into the punch (11) to align with the locking ring groove on the end face of the bearing, and finally the pressing machine is pressed downwards to press the locking ring (04) into the guide sleeve to complete the assembly of the bearing (09).
6. Referring to fig. 3 and 4, the process locking ring (05) is provided with two rectangular process locking ring dismounting grooves (051) along the central line; the material of the technical lock ring (05) is spring steel with the mark of 65Mn.
7. Referring to fig. 5 and 6, one side of the dismounting tool (06) is provided with a cutting seam (061) along the central line, and two surfaces of the cutting seam (061) are both provided with elastic threaded holes (062).
8. After inspection, the wide-temperature-range low-temperature split outer ring self-lubricating knuckle bearing processed by the process is high in dimensional precision, good in consistency and flexible in swinging.
Claims (4)
1. A processing technology of a wide-temperature-range low-temperature split outer ring self-lubricating spherical plain bearing comprises an inner ring (02) and an outer ring processing flow of the bearing, a bearing split outer ring integrated processing method, a split method of the bearing split outer ring integrated processing method and a bearing lock ring assembling method, and is characterized in that: A. the processing flow of the bearing outer ring comprises the following steps: sawing a blank, cutting the blank by a sleeve, performing heat treatment, performing rough turning forming, performing cryogenic treatment at-196 ℃, performing linear cutting on split outer rings, identifying the split outer rings in pairs, performing finish turning on the outer diameter, performing finish turning on a lock ring groove on one side, assembling a process lock ring (05) on one side, performing finish turning on a lock ring groove on the other side, assembling a process lock ring (05) on the other side, performing primary grinding on two end surfaces, performing primary grinding on the outer diameter, performing finish turning on a spherical surface, performing additional tempering, performing final grinding on two end surfaces, performing final grinding on the outer diameter, performing final grinding on the spherical surface, performing magnetic powder inspection, grinding the outer diameter, performing laser identification, removing the process lock ring (05), and adhering a PTFE fabric liner (03) on the spherical surface; B. the processing flow of the bearing inner ring (02) comprises the following steps: sawing a blank, cutting, performing heat treatment, performing rough turning forming, performing subzero treatment at-196 ℃, performing primary grinding on two end faces, performing primary grinding on a spherical surface, performing primary grinding on an inner diameter, performing additional tempering, performing final grinding on the two end faces, performing laser marking, performing final grinding on the spherical surface (matched grinding according to the spherical size of an outer ring and the radial clearance requirement), performing final grinding on the inner diameter, performing magnetic powder inspection, performing ultra-precision spherical surface, performing chromium plating on the spherical surface, and performing ultra-precision chromium plating; C. the processing method of the bearing split outer ring assembly comprises the following steps: firstly, clamping two split semi-outer rings (01) by using a three-jaw chuck on a high-precision numerical control lathe, after finishing an outer diameter finish turning process, finish turning a lock ring groove on one side end face by taking an outer diameter face as a reference, then assembling a process lock ring (05), and after finishing one side, repeating the two processes to ensure that the two semi-outer rings (01) are combined into an outer ring; D. the method for splitting the bearing after splitting the outer ring into the combined body comprises the following steps: firstly, putting the integrated bearing outer ring into a technological lock ring disassembling tool (06), screwing a tightening bolt in a tightening threaded hole (062) to fix the integrated bearing outer ring, then installing a T-shaped positioning block through a positioning block threaded hole (063) of the disassembling tool (06) to fix the T-shaped positioning block on a workbench, and finally disassembling the technological lock ring (05) by using a mechanical puller (07); E. the assembling method of the bearing lock ring (04) comprises the following steps: and (2) putting the bearing (09) which is completely sleeved into the guide sleeve (10), positioning the bearing (09) through a mandrel in the middle of the guide sleeve (10), then putting the lock ring (04) into the punch (11) to align with the lock ring groove on the end face of the bearing, and finally pressing down the press to press the lock ring (04) into the guide sleeve to complete the assembly of the bearing (09).
2. The processing technology of the wide-temperature-range low-temperature-profile outer ring self-lubricating spherical plain bearing according to claim 1 is characterized in that: two rectangular technological lock ring disassembling grooves (051) are formed in the technological lock ring (05) along the center line.
3. The processing technology of the wide-temperature-range low-temperature-profile outer ring self-lubricating spherical plain bearing according to claim 1 is characterized in that: the material of the technical lock ring (05) is spring steel with the mark of 65Mn.
4. The processing technology of the wide-temperature-range low-temperature-profile outer ring self-lubricating knuckle bearing according to claim 1, characterized in that: one side of the disassembling tool (06) is provided with a cutting seam (061) along the central line, and two surfaces of the cutting seam (061) are provided with elastic threaded holes (062).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111132581.0A CN115853905A (en) | 2021-09-27 | 2021-09-27 | Processing technology of wide-temperature-range low-temperature-profile outer ring self-lubricating joint bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111132581.0A CN115853905A (en) | 2021-09-27 | 2021-09-27 | Processing technology of wide-temperature-range low-temperature-profile outer ring self-lubricating joint bearing |
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| CN115853905A true CN115853905A (en) | 2023-03-28 |
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| CN202111132581.0A Pending CN115853905A (en) | 2021-09-27 | 2021-09-27 | Processing technology of wide-temperature-range low-temperature-profile outer ring self-lubricating joint bearing |
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| CN (1) | CN115853905A (en) |
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2021
- 2021-09-27 CN CN202111132581.0A patent/CN115853905A/en active Pending
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