CN114962459A - Tunneling machine main bearing and matching processing method of outer ring raceway surface and thin-wall ring piece of tunneling machine main bearing - Google Patents
Tunneling machine main bearing and matching processing method of outer ring raceway surface and thin-wall ring piece of tunneling machine main bearing Download PDFInfo
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- CN114962459A CN114962459A CN202210771783.8A CN202210771783A CN114962459A CN 114962459 A CN114962459 A CN 114962459A CN 202210771783 A CN202210771783 A CN 202210771783A CN 114962459 A CN114962459 A CN 114962459A
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- 230000005641 tunneling Effects 0.000 title claims abstract description 12
- 238000003672 processing method Methods 0.000 title description 3
- 238000003754 machining Methods 0.000 claims abstract description 73
- 238000010791 quenching Methods 0.000 claims abstract description 35
- 230000000171 quenching effect Effects 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000004381 surface treatment Methods 0.000 claims abstract description 8
- 238000000137 annealing Methods 0.000 claims abstract description 4
- 238000005242 forging Methods 0.000 claims abstract description 4
- 238000005496 tempering Methods 0.000 claims description 20
- 238000005096 rolling process Methods 0.000 claims description 14
- 238000004321 preservation Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
- F16C19/545—Systems comprising at least one rolling bearing for radial load in combination with at least one rolling bearing for axial load
Abstract
The invention provides a method for processing a raceway surface and a thin-wall ring piece of an outer ring of a main bearing of a tunneling machine in a matching way, which comprises the following steps: forging an assembly of the outer ring and the thin-wall ring piece, and performing stress relief annealing treatment on the assembly; roughly turning the inner wall of the assembly; carrying out surface treatment on the assembly subjected to rough turning; separating the assembly into an outer ring and a thin-walled ring; respectively processing an outer diameter groove of the thin-wall ring piece, the inner diameter of the thin-wall ring piece, a radial hole of the outer ring and the outer inner diameter to ensure the coaxiality of end faces of the outer ring and the thin-wall ring piece which are matched with each other; sequentially carrying out primary finish machining on two quenching surfaces of the thin-wall ring piece, carrying out finish machining on the inner wall of the thin-wall ring piece and carrying out finish machining on the two quenching surfaces of the thin-wall ring piece; and finishing the matching processing of the outer ring raceway surface and the thin-wall ring piece.
Description
Technical Field
The invention relates to the technical field of bearing machining, in particular to a main bearing of a heading machine and a method for machining a track surface of an outer ring of the main bearing of the heading machine and a thin-wall ring piece in a matched mode.
Background
The main bearing is a core component of a shield main driving system and plays a role in directly transmitting power and load. The main bearing mainly comprises a thin-wall ring piece, an outer ring, an inner ring, a main push roller, an auxiliary push roller, a radial roller and a retainer for mounting the rollers, wherein a main push roller path for mounting the main push roller, an auxiliary push roller path for mounting the auxiliary push roller and a radial roller path for mounting the radial roller are formed between the inner wall of the outer ring and the outer wall of the inner ring, and the main push roller path bears axial force, and the auxiliary push roller path bears reverse thrust generated by overturning moment and the radial roller path bears radial force; the main push roller path and the auxiliary push roller path are both planes, and have high processing and rotating precision; one side of the thin-wall ring piece is used as an auxiliary pushing raceway, and the purpose is to relieve axial impact load on a main bearing of the shield machine during construction and prolong the service life of the main bearing.
The thin-wall ring piece in the main bearing is used as a large ring piece, and is easy to deform in the machining process, and the thin-wall ring piece is used as a raceway surface and has high requirements on the flatness and the parallelism of the thin-wall ring piece, so that the machining difficulty of the thin-wall ring piece is high.
Disclosure of Invention
A main bearing of a heading machine comprises a first outer ring, a second outer ring, an inner ring, a rolling body and a thin-wall ring piece;
the first outer ring is sleeved on the inner ring, and a raceway for mounting a rolling body is arranged between the first outer ring and the inner ring;
the second outer ring is connected with the first outer ring and sleeved on the inner ring, and a roller path for mounting a rolling body is arranged between the second outer ring and the inner ring;
the rolling element comprises a main pushing roller, a radial roller and an auxiliary pushing roller, the main pushing roller is arranged in a main pushing raceway formed between a first outer ring and an inner ring, the radial roller is arranged in a radial raceway formed between a second outer ring and the inner ring, the auxiliary pushing roller is arranged in an auxiliary pushing raceway formed between the second outer ring and the inner ring, the central axes of the radial roller and the inner ring are arranged in parallel, and the central axes of the main pushing roller and the auxiliary pushing roller and the central axis of the radial roller are arranged in a mutually perpendicular mode;
the thin-wall ring piece is arranged in the auxiliary pushing roller path and is arranged between the auxiliary pushing roller and the inner wall of the second outer ring.
The invention provides a method for cooperatively processing a raceway surface and a thin-wall ring piece of an outer ring of a main bearing of a tunneling machine, which is used for cooperatively processing the raceway surface and the thin-wall ring piece of the outer ring of the main bearing of the tunneling machine and comprises the following steps:
forging an assembly of the outer ring and the thin-wall ring piece, and performing stress relief annealing treatment on the assembly;
step two, carrying out rough turning on the inner wall of the assembly;
step three, carrying out surface treatment on the assembly subjected to rough turning;
step four, separating the assembly into an outer ring and a thin-wall ring piece;
step five, respectively processing the outer diameter groove of the thin-wall ring piece, the inner diameter of the thin-wall ring piece, the radial hole of the outer ring and the inner diameter of the outer ring so as to ensure the coaxiality of the end faces of the outer ring and the thin-wall ring piece which are matched with each other;
step six, sequentially carrying out primary finish machining on two quenching surfaces of the thin-wall ring piece, carrying out finish machining on the inner wall of the thin-wall ring piece and carrying out finish machining on the two quenching surfaces of the thin-wall ring piece;
and step seven, finishing the matching processing of the outer ring raceway surface and the thin-wall ring piece.
Optionally, in the second step, a specific method for roughly turning the inner wall of the assembly is as follows:
s2.1, presetting one end face, which is used for manufacturing the thin-wall ring piece and is perpendicular to the central axis of the assembly, in the assembly as a reference surface;
and S2.2, roughly turning the inner wall of the assembly based on the reference surface, and reserving a machining allowance of 4-6 mm on the inner wall of the assembly.
Optionally, in the third step, a specific method for performing surface treatment on the roughly machined assembly is as follows:
s3.1, placing the assembly subjected to rough turning in a well type tempering furnace for primary tempering treatment,
s3.2, quenching the reference surface and the end surface parallel to the reference surface in the assembly after tempering,
and S3.3, carrying out secondary tempering treatment on the assembly after quenching.
Optionally, the temperature of the first tempering treatment is set to be 160-180 ℃, and the heat preservation time is set to be 240-260 min.
Optionally, the hardness after quenching treatment is set to 68HRC-62 HRC.
Optionally, the temperature of the second tempering treatment is set to be 160-180 ℃, and the heat preservation time is set to be 240-260 min.
Optionally, the specific method for separating the assembly into the outer ring and the thin-wall ring piece in the fourth step is as follows: and separating the outer ring from the thin-wall ring piece by turning, and reserving a machining allowance of 6-8 mm for the outer ring of the separated thin-wall ring piece.
Optionally, in the fifth step, when the inner diameter of the outer ring and the inner diameter of the thin-walled ring are processed, turning is performed, and an outer end face of the outer ring, which is parallel to the reference face, is used as a processing reference face, so as to ensure flatness between the outer ring and the thin-walled ring.
Optionally, in the sixth step, a specific method for performing primary finish machining on two quenching surfaces of the thin-wall ring piece is as follows:
1) the outer ring and the thin-wall ring piece are mutually locked through a connecting piece;
2) carrying out grinding primary finish machining or turning primary finish machining on the outward first quenching surface of the thin-wall ring piece in a single machining mode of 2-4 mm;
3) loosening the connecting piece, turning the thin-wall ring piece by 180 degrees and then locking;
4) performing grinding primary finish machining or turning primary finish machining on the second quenching surface of the thin-wall ring piece in a single machining mode of 2-4 mm;
5) and finishing the primary finish machining of the two quenching surfaces of the thin-wall ring piece.
Optionally, in the sixth step, a specific method for performing finish machining on the inner wall of the thin-walled ring piece is as follows: and carrying out finish turning on the inner wall of the thin-wall ring piece by adopting a single-time machining 4mm mode.
Optionally, in the sixth step, a specific method for performing finish machining on two quenching surfaces of the thin-wall ring piece is as follows:
A. the outer ring and the thin-wall ring piece are mutually locked through a connecting piece;
B. performing grinding primary finish machining or turning primary finish machining on the outward first quenching surface of the thin-wall ring by adopting a single machining mode of 0.2-0.4 mm;
C. loosening the connecting piece, turning the thin-wall ring piece by 180 degrees and then locking;
D. carrying out grinding primary finish machining or turning primary finish machining on the second quenching surface of the thin-wall ring piece in a single machining mode of 0.2mm-0.4 mm;
E. and finishing the primary finish machining of the two quenching surfaces of the thin-wall ring piece.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, the outer ring in the main bearing is used as the processing tool of the thin-wall ring piece, so that the deformation of the thin-wall ring piece in the processing process is effectively prevented, and the flatness and parallelism between the thin-wall ring piece and the outer ring are synchronously ensured, thereby ensuring the flatness and parallelism of the thin-wall ring piece as an auxiliary pushing raceway surface.
(2) According to the invention, the outer ring and the thin-wall ring piece are subjected to surface treatment (primary tempering, quenching and secondary tempering), and the thin-wall ring piece is ensured to have good hardness and hardening layer depth by specifically setting the temperature and the heat preservation time of the surface treatment process.
(3) According to the invention, the outer ring of the main bearing is used as the thin-wall ring processing tool, so that high flatness and parallelism are ensured when the mounting surface and the raceway surface of the thin-wall ring are processed, and the processing efficiency is improved.
(4) The connecting piece is arranged to prevent the thin-wall ring piece from axially moving in the machining process.
(5) According to the invention, the processing datum of the outer ring and the thin-wall ring piece are set to be the same datum plane, so that the matched clearance processing is carried out between the outer ring raceway surface and the thin-wall ring piece, and compared with the matched clearance of a common raceway, the processing of the associated size is reduced, the clearance matching efficiency is improved, and the processing time of the whole set of bearing is reduced.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic structural diagram of a main bearing of a heading machine in an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a forge piece of the outer ring and the thin-wall ring piece in the embodiment of the invention;
FIG. 3 is a schematic structural diagram of the outer ring and the thin-walled ring member connected by the connecting member in the embodiment of the present invention.
Wherein:
10. the device comprises a forged piece, 1, an outer ring, 2, a thin-wall ring piece, 3, a connecting piece, 4, a first outer ring, 5, an inner ring, 6, a rolling body, 6.1, a main pushing roller, 6.2, a radial roller, 6.3 and an auxiliary pushing roller.
Detailed Description
In order to make the aforementioned objects, features, advantages, and the like of the present invention more clearly understandable, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the drawings of the present invention are simplified and are not to precise scale, and are provided for convenience and clarity in assisting the description of the embodiments of the present invention; the numbers mentioned in the present invention are not limited to the specific numbers in the examples of the drawings; the directions or positional relationships indicated by ' front ' middle ', rear ', left ', right ', upper ', lower ', top ', bottom ', middle ' and the like in the present invention are based on the directions or positional relationships shown in the drawings of the present invention, and do not indicate or imply that the devices or parts referred to must have specific directions, nor should be construed as limiting the present invention.
In this embodiment:
referring to fig. 1, the invention provides a main bearing of a heading machine, which comprises a first outer ring 4, a second outer ring 1, an inner ring 5, a rolling body 6 and a thin-wall ring piece 2;
the first outer ring 4 is sleeved on the inner ring;
the second outer ring 1 is connected with the first outer ring 4 and sleeved on the inner ring 5;
the rolling body 6 comprises a main push roller 6.1, a radial roller 6.2 and an auxiliary push roller 6.3, the main push roller 6.1 is arranged in a main push rolling way formed between the first outer ring 4 and the inner ring 5, the radial roller 6.2 is arranged in a radial rolling way formed between the second outer ring 1 and the inner ring 5, the auxiliary push roller 6.3 is arranged in an auxiliary push rolling way formed between the second outer ring 1 and the inner ring 5, the central axis of the radial roller 6.2 and the central axis of the inner ring 5 are arranged in parallel, and the central axes of the main push roller 6.1 and the auxiliary push roller 6.3 and the central axis of the radial roller 6.2 are arranged in a mutually perpendicular mode;
the thin-wall ring piece 2 is arranged in the auxiliary pushing roller way and is arranged between the auxiliary pushing roller 6.3 and the inner wall of the second outer ring 1.
The invention also provides a matching processing method of the outer ring raceway surface and the thin-wall ring piece of the main bearing of the tunneling machine, which comprises the following steps:
step one, processing the outer ring and the thin-wall ring piece into a whole piece (a forged piece 10 shown in fig. 2) by adopting a forging mode, and performing stress relief annealing treatment on the forged piece 10;
step two, carrying out rough turning on the inner wall of the forged piece 10: presetting one end face, which is used for manufacturing the thin-wall ring piece and is perpendicular to the central axis of the forge piece 10, in the forge piece 10 as a reference plane, and carrying out rough turning on the inner wall of the forge piece 10 based on the reference plane;
step three, surface treatment: placing the forged piece 10 after rough turning in a well-type tempering furnace for primary tempering treatment, quenching a reference surface and end surfaces parallel to the reference surface in the forged piece 10 after tempering, and performing secondary tempering treatment on the forged piece 10 after quenching;
step four, separating the second outer ring 1 from the thin-wall ring piece 2: separating the second outer ring 1 from the thin-wall ring 2 by turning, and reserving a machining allowance of 7mm for the outer ring of the separated thin-wall ring 2;
step five, respectively processing the outer diameter groove of the thin-wall ring piece 2, the inner diameter of the thin-wall ring piece 2, the radial hole of the second outer ring 1 and the inner diameter of the second outer ring 1 so as to ensure the coaxiality of the end surfaces of the second outer ring 1 and the thin-wall ring piece 2 which are matched with each other;
sixthly, a connecting piece 3 (the connecting piece 3 is preferably set to be in a structure of a bolt, a pin and the like) is arranged in a radial hole of the second outer ring 1 in a penetrating mode, one end of the connecting piece 3 is clamped in an outer diameter groove of the thin-wall ring piece 2, and the second outer ring 1 and the thin-wall ring piece 2 are locked with each other (see fig. 3);
step seven, finish machining the end faces of the thin-wall ring piece 2, which are parallel to the reference face: carrying out fine grinding or fine turning on the end face parallel to the reference surface in the thin-wall ring piece 2 by adopting a single 4mm processing mode;
step eight, finish machining the inner wall of the thin-wall ring piece 2: the second outer ring 1 and the thin-wall ring piece 2 are mutually locked through the connecting piece 3, and the inner wall of the thin-wall ring piece 2 is subjected to finish turning in a 4mm single-time processing mode;
step nine, finish machining the datum plane of the thin-wall ring piece 2: the second outer ring 1 and the thin-wall ring piece 2 are mutually locked through the connecting piece 3, the reference surface of the thin-wall ring piece 2 is arranged outwards, and the reference surface of the thin-wall ring piece 2 is finely ground in a 0.2mm mode each time;
and step ten, finishing the matching processing of the raceway surface of the second outer ring 1 and the thin-wall ring piece 2.
Optionally, in the second step, when the inner wall of the forged piece 10 is roughly turned, a machining allowance of 4mm to 6mm needs to be reserved for the inner wall of the forged piece 10.
Optionally, in the third step, the temperature of the first tempering treatment is set to 170 ℃, and the heat preservation time is set to 240 min; the hardness after quenching treatment is set to be 68HRC-62 HRC; the temperature of the second tempering treatment is set to be 170 ℃, and the heat preservation time is set to be 240 min.
Optionally, in the fifth step, when the inner diameter of the second outer ring 1 and the inner diameter of the thin-walled ring 2 are processed, turning is performed, and an outer end face of the second outer ring 1, which is parallel to the reference face, is used as a processing reference face, so as to ensure flatness between the second outer ring 1 and the thin-walled ring 2.
Optionally, in the seventh step, a specific method for finish machining the end face of the thin-walled ring 2 parallel to the reference surface thereof is as follows:
1) the second outer ring 1 and the thin-wall ring piece 2 are mutually locked through a connecting piece 3;
2) performing grinding primary finish machining or turning primary finish machining on the outward first quenching surface of the thin-wall ring 2 in a single machining mode of 4 mm;
3) loosening the connecting piece 3, turning the thin-wall ring piece 2 by 180 degrees and then locking;
4) carrying out grinding primary finish machining or turning primary finish machining on the second quenching surface of the thin-wall ring piece 2 in a 4mm single-time machining mode;
5) and finishing the primary finish machining of the two quenching surfaces of the thin-wall ring piece 2.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A main bearing of a heading machine is characterized by comprising a first outer ring, a second outer ring, an inner ring, a rolling body and a thin-wall ring piece;
the first outer ring is sleeved on the inner ring, and a roller path for mounting a rolling body is arranged between the first outer ring and the inner ring;
the second outer ring is connected with the first outer ring and sleeved on the inner ring, and a roller path for mounting a rolling body is arranged between the second outer ring and the inner ring;
the rolling elements comprise main pushing rollers, radial rollers and auxiliary pushing rollers, the main pushing rollers are arranged in a main pushing roller path formed between the first outer ring and the inner ring, the radial rollers are arranged in a radial roller path formed between the second outer ring and the inner ring, the auxiliary pushing rollers are arranged in an auxiliary pushing roller path formed between the second outer ring and the inner ring, the central axes of the radial rollers and the central axis of the inner ring are arranged in parallel, and the central axes of the main pushing rollers and the auxiliary pushing rollers and the central axes of the radial rollers are arranged in a mutually perpendicular mode;
the thin-wall ring piece is arranged in the auxiliary pushing roller path and is arranged between the auxiliary pushing roller and the inner wall of the second outer ring.
2. A method for cooperatively processing a main bearing outer ring raceway surface and a thin-wall ring piece of a tunneling machine is used for cooperatively processing the main bearing outer ring raceway surface and the thin-wall ring piece of the tunneling machine according to claim 1; the method is characterized by comprising the following steps:
forging an assembly of the outer ring and the thin-wall ring piece, and performing stress relief annealing treatment on the assembly;
step two, carrying out rough turning on the inner wall of the assembly;
step three, carrying out surface treatment on the assembly subjected to rough turning;
step four, separating the assembly into an outer ring (1) and a thin-wall ring piece (2);
step five, respectively processing an outer diameter groove of the thin-wall ring piece (2), the inner diameter of the thin-wall ring piece (2), a radial hole of the outer ring (1) and the inner diameter of the outer ring (1) so as to ensure the coaxiality of end faces of the outer ring (1) and the thin-wall ring piece (2) which are matched with each other;
step six, sequentially carrying out primary finish machining on two quenching surfaces of the thin-wall ring piece (2), carrying out finish machining on the inner wall of the thin-wall ring piece (2) and carrying out finish machining on the two quenching surfaces of the thin-wall ring piece (2);
and seventhly, finishing the matching processing of the raceway surface of the outer ring (1) and the thin-wall ring piece (2).
3. The method for machining the track surface of the main bearing outer ring and the thin-wall ring piece of the heading machine according to claim 2, wherein in the second step, the specific method for roughly machining the inner wall of the assembly is as follows:
s2.1, presetting one end face, which is used for manufacturing the thin-wall ring piece and is perpendicular to the central axis of the assembly, in the assembly as a reference surface;
and S2.2, roughly turning the inner wall of the assembly based on the reference surface, and reserving a machining allowance of 4-6 mm for the inner wall of the assembly.
4. The method for matching and processing the raceway surface and the thin-wall ring piece of the main bearing outer ring of the heading machine according to claim 2, wherein in the third step, a specific method for performing surface treatment on the roughly-turned assembly is as follows:
s3.1, placing the assembly subjected to rough turning in a well type tempering furnace for primary tempering treatment,
s3.2, quenching the reference surface and the end surface parallel to the reference surface in the assembly after tempering,
and S3.3, carrying out secondary tempering treatment on the assembly after quenching.
5. The method for matching and processing the raceway surface and the thin-wall ring piece of the main bearing outer ring of the tunneling machine according to claim 5, wherein the temperature of the first tempering treatment is set to be 160-180 ℃, and the heat preservation time is set to be 240-260 min;
the hardness after quenching treatment is set to be 68HRC-62 HRC;
the temperature of the second tempering treatment is set to be 160-180 ℃, and the heat preservation time is set to be 240-260 min.
6. The method for matching the raceway surface of the main bearing outer ring and the thin-walled ring piece of the heading machine according to claim 2, wherein the step four comprises the following specific steps of separating the assembly into the outer ring (1) and the thin-walled ring piece (2):
the outer ring (1) is separated from the thin-wall ring (2) by turning, and the outer ring of the separated thin-wall ring (2) is reserved with machining allowance of 6-8 mm.
7. The method for matching the raceway surface of the main bearing outer ring and the thin-walled ring piece of the heading machine according to claim 2, wherein in the fifth step, when the inner diameter of the outer ring (1) and the inner diameter of the thin-walled ring piece (2) are machined, turning is performed, and the outer end surface of the outer ring (1) parallel to the reference surface is used as a machining reference surface so as to ensure the flatness between the outer ring (1) and the thin-walled ring piece (2).
8. The method for machining the track surface of the main bearing outer ring and the thin-wall ring piece of the tunneling machine in a matched mode according to claim 2, wherein in the sixth step, the specific method for performing primary finish machining on the two quenching surfaces of the thin-wall ring piece (2) is as follows:
1) the outer ring (1) and the thin-wall ring piece (2) are locked with each other through a connecting piece (3);
2) carrying out grinding primary finish machining or turning primary finish machining on the outward first quenching surface of the thin-wall ring piece (2) in a mode of machining 2-4 mm once;
3) loosening the connecting piece (3), turning the thin-wall ring piece (2) for 180 degrees and then locking;
4) carrying out grinding primary finish machining or turning primary finish machining on the second quenching surface of the thin-wall ring piece (2) in a single-time machining mode of 2-4 mm;
5) finishing the primary finish machining of the two quenching surfaces of the thin-wall ring piece (2).
9. The method for machining the track surface of the main bearing outer ring and the thin-walled ring piece of the heading machine according to claim 2, wherein in the sixth step, the specific method for finish machining the inner wall of the thin-walled ring piece (2) comprises the following steps: and (3) carrying out finish turning on the inner wall of the thin-wall ring piece (2) by adopting a single-time machining 4mm mode.
10. The method for machining the track surface of the main bearing outer ring and the thin-walled ring piece of the heading machine according to claim 2, wherein in the sixth step, the specific method for finely machining the two quenching surfaces of the thin-walled ring piece (2) comprises the following steps:
A. the outer ring (1) and the thin-wall ring piece (2) are locked with each other through a connecting piece (3);
B. carrying out grinding primary finish machining or turning primary finish machining on the outward first quenching surface of the thin-wall ring piece (2) by adopting a single machining mode of 0.2mm-0.4 mm;
C. loosening the connecting piece (3), turning the thin-wall ring piece (2) for 180 degrees and then locking;
D. carrying out grinding primary finish machining or turning primary finish machining on the second quenching surface of the thin-wall ring piece (2) by adopting a single machining mode of 0.2mm-0.4 mm;
E. finishing the primary finish machining of the two quenching surfaces of the thin-wall ring piece (2).
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| CN202210771783.8A CN114962459B (en) | 2022-06-30 | 2022-06-30 | Main bearing of heading machine and matching processing method of outer ring raceway surface of main bearing of heading machine and thin-wall ring piece |
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| CN202210771783.8A CN114962459B (en) | 2022-06-30 | 2022-06-30 | Main bearing of heading machine and matching processing method of outer ring raceway surface of main bearing of heading machine and thin-wall ring piece |
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| CN114012465A (en) * | 2021-12-08 | 2022-02-08 | 中国铁建重工集团股份有限公司 | Thin-wall ring piece machining tool and machining method |
| CN114029711A (en) * | 2021-12-08 | 2022-02-11 | 中国铁建重工集团股份有限公司 | Bearing ring assembly machining method |
| CN114135576A (en) * | 2021-12-13 | 2022-03-04 | 中国铁建重工集团股份有限公司 | Main bearing of heading machine and machining method of main bearing outer ring assembly |
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2022
- 2022-06-30 CN CN202210771783.8A patent/CN114962459B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180328409A1 (en) * | 2015-11-10 | 2018-11-15 | Shanghai F&S Bearing Tech Co., Ltd. | Manufacturing method of thin-wall bearing and method for machining thin-wall inner ring/outer ring of the thin-wall bearing as well as precise flexible bearing |
| CN210164794U (en) * | 2019-05-17 | 2020-03-20 | 马鞍山方圆精密机械有限公司 | Three-row column type slewing bearing capable of automatically compensating clearance |
| CN111734735A (en) * | 2020-07-03 | 2020-10-02 | 中国铁建重工集团股份有限公司 | Outer ring of main bearing of tunneling machine and main bearing of tunneling machine |
| CN114012465A (en) * | 2021-12-08 | 2022-02-08 | 中国铁建重工集团股份有限公司 | Thin-wall ring piece machining tool and machining method |
| CN114029711A (en) * | 2021-12-08 | 2022-02-11 | 中国铁建重工集团股份有限公司 | Bearing ring assembly machining method |
| CN114135576A (en) * | 2021-12-13 | 2022-03-04 | 中国铁建重工集团股份有限公司 | Main bearing of heading machine and machining method of main bearing outer ring assembly |
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| CN114962459B (en) | 2023-12-15 |
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