CN106369062A - Machining method of non-tooth bearing and bearing - Google Patents
Machining method of non-tooth bearing and bearing Download PDFInfo
- Publication number
- CN106369062A CN106369062A CN201610851089.1A CN201610851089A CN106369062A CN 106369062 A CN106369062 A CN 106369062A CN 201610851089 A CN201610851089 A CN 201610851089A CN 106369062 A CN106369062 A CN 106369062A
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- Prior art keywords
- bearing
- anodontia
- raceway
- cylindrical
- carry out
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F16C33/64—Special methods of manufacture
-
- 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
-
- 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
- F16C2220/00—Shaping
- F16C2220/60—Shaping by removing material, e.g. machining
- F16C2220/62—Shaping by removing material, e.g. machining by turning, boring, drilling
-
- 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
- F16C2223/00—Surface treatments; Hardening; Coating
- F16C2223/10—Hardening, e.g. carburizing, carbo-nitriding
- F16C2223/18—Hardening, e.g. carburizing, carbo-nitriding with induction hardening
Abstract
The invention discloses a machining method of a non-tooth bearing and the bearing. The machining method comprises the following steps of rough turning, semi-finish turning, thermal treatment, finish turning, marking, drilling, oil hole forming, assembling and storing into a warehouse. According to the machining method of the non-tooth outer ring bearing, an induction heat treatment technology is adopted, an electromagnetic coil is powered on for heating, and compared with a traditional heat treatment technique, the method has the advantages that the process is simple, the heat treatment cost is low, and the quality of the manufactured bearing part is good. According to the machining method of the non-tooth bearing and the bearing, an oil hole is formed in a punching mode, the formed oil hole has the characteristics that the number of burrs is small and the roundness is good compared with an oil hole formed in a traditional drilling mode, and efficiency is also improved by 3-4 times. By application of the machining method of the non-tooth bearing and the bearing, the production cost can be effectively reduced, and benefits are improved.
Description
Technical field
The present invention relates to a kind of mechanical processing technique is and in particular to a kind of processing method of anodontia bearing and bearing.
Background technology
Bearing is a kind of general part being widely used in machine industry.It is characterized in that rotating speed is high, load is big, frictional force
Little, high precision, can bear and come from radial and axial load.During the manufacturing of bearing, in order that bearing has relatively
High hardness, enough rub proofnesses and longer service life, need to bearing heat treatment.Traditional bearing processing is very
Difficulty meets the demand to aspects such as hardness, toughness, bearing capacity and service lifes for the bearing.
Content of the invention
The problem existing for above-mentioned prior art, the present invention provides a kind of processing method of anodontia bearing, can be effective
The anodontia race bearing of reduction kind production cost, improve bearing quality.
In order to solve above-mentioned technical problem, the present invention adopt the following technical scheme that a kind of processing method of anodontia bearing and
Bearing, the procedure of processing of described outer ring is as follows:
(1) rough turn: forging blank to be carried out clamping, correction inner circle is beated for 0-1.6mm, cylindrical beated for 0-0.5mm, root
Carry out rough turn processing according to turning process drawing, control cylindrical and inner circle diameter error is not more than 1mm, individual pen height error is not more than
0.8mm；
(2) half smart cars: rough turn rear forging is carried out clamping, correction is cylindrical to beat for 0-0.2mm, according to turning process drawing
Carry out half finishing processing, control raceway diameter and the high no more than 0.3mm in ring center；
(3) heat treatment: carry out heat treatment, the profile of induction loop and raceway with the countershaft raceway that holds of induction loop
Consistent, electrified regulation, after heating certain time reaches hardening heat, fall into cooling, quenching liquid concentration in hardening media immediately
For 0.48ml/l, quenching hydraulic coupling is 0.2mpa, and control raceway hardness is 55-62hrc, and depth of hardening zone is more than 3 millimeters, afterwards
It is tempered 4h at 200 DEG C；
(4) smart car: bearing non-referenced face is placed on equal height cushion block, correction inner circle is beated for 0-0.1mm, uses pressing plate pressure
Tightly, finishing processing is carried out according to turning process drawing, control outside diameter, interior circular diameter and raceway centre-height error to be not more than
0.1mm, smoothness requirements are ra3.2；
(5) rule: after the overall dimensions of measurement part, rule and positioning process according to drawing regulation；
(6) hole: comparison drawing detection line size is it is ensured that carry out drilling operating again after size is correct, by bearing
Datum level is placed on radial drill workbench equal-height block, with pressing plate compression it is ensured that the steady no tilting of workpiece, center line of bit is aligned
Holed in hole center, control hole diameter error is not more than 0.1mm；
(7) oilhole: bearing is fixed on punch press, oil outlet is manufactured using punch process mode, using chamfering device,
Chamfering is processed on oilhole；
(8) assemble: part is carried out trial assembly and joins, measure preliminary clearance, according to calculating data and trial assembly clearance, then carry out
Grinding afterwards, allots final drawing regulation clearance；
(9) put in storage: part is detected and is made respective record, demagnetize, clean, pack and provide the quality certification, warehouse-in.
As the optimization further of such scheme, described forging blank material trademark is 50mn.
As the optimization further of such scheme, in step (2), should ensure that each card melon clamping during clamping is cylindrical
Power uniformly, and is compressed at cylindrical place with four pressing plates.
As the optimization further of such scheme, in step (3), described electrified regulation, its voltage is 420v, electric current is
120a, linear velocity are 62mm/min, power is 50kw, frequency is 3600hz.
Present invention also offers a kind of anodontia bearing, possesses the processing method formation recorded by described claim 1
Outer ring.
As the optimization further of such scheme, described forging blank material trademark is 50mn.
As the optimization further of such scheme, in step (2), should ensure that each card melon clamping during clamping is cylindrical
Power uniformly, and is compressed at cylindrical place with four pressing plates.
As the optimization further of such scheme, in step (3), described electrified regulation, its voltage is 420v, electric current is
120a, linear velocity are 62mm/min, power is 50kw, frequency is 3600hz.
Present invention also offers a kind of processing method of anodontia bearing and bearing, the procedure of processing of described inner ring is as follows:
(1) rough turn: forging blank to be carried out clamping, correction inner circle is beated for 0-1.6mm, cylindrical beated for 0-0.5mm, root
Carry out rough turn processing according to turning process drawing, control cylindrical and inner circle diameter error is not more than 1mm, individual pen height error is not more than
0.8mm；
(2) half smart cars: rough turn rear forging is carried out clamping, correction is cylindrical to beat for 0-0.2mm, according to turning process drawing
Carry out half finishing processing, control raceway diameter and the high no more than 0.3mm in ring center；
(3) heat treatment: carry out heat treatment, the profile of induction loop and raceway with the countershaft raceway that holds of induction loop
Consistent, electrified regulation, after heating certain time reaches hardening heat, fall into cooling, quenching liquid concentration in hardening media immediately
For 0.48ml/l, quenching hydraulic coupling is 0.2mpa, and control raceway hardness is 55-62hrc, and depth of hardening zone is more than 3 millimeters, afterwards
It is tempered 4h at 200 DEG C；
(4) smart car: bearing non-referenced face is placed on equal height cushion block, correction inner circle is beated for 0-0.1mm, uses pressing plate pressure
Tightly, finishing processing is carried out according to turning process drawing, control outside diameter, interior circular diameter and raceway centre-height error to be not more than
0.1mm, smoothness requirements are ra3.2；
(5) rule: after the overall dimensions of measurement part, rule and positioning process according to drawing regulation；
(6) hole: comparison drawing detection line size is it is ensured that carry out drilling operating again after size is correct, by bearing
Datum level is placed on radial drill workbench equal-height block, with pressing plate compression it is ensured that the steady no tilting of workpiece, center line of bit is aligned
Holed in hole center, control hole diameter error is not more than 0.1mm.
Present invention also offers a kind of anodontia bearing, possesses the inner ring being formed by above-mentioned processing method.
Compared with the prior art, the having the beneficial effect that of the processing method of a kind of anodontia bearing of the present invention:
(1) processing method of a kind of anodontia bearing of the present invention adopts induction heat treatment technology, is energized with induction loop
Heating, compared with prior heat treatment technology, has the spy such as bearing partss quality is good of process is simple, heat treatment low cost, preparation
Point, has the advantages that environmental protection and is finish-machined to the good size of precision.
(2) processing method of a kind of anodontia bearing of the present invention manufactures oilhole using punch process mode, with traditional brill
Hole machined mode is compared, and the oilhole of preparation has the features such as burr is few, and circularity is good, and efficiency also improves 3-4 times.By described
Processing method can shape each structure member using shorten leading time, if using the inner ring of the present invention and outer ring group
Dress bearing, then be capable of the raising of production efficiency.
Specific embodiment
For making the object, technical solutions and advantages of the present invention of greater clarity, below by embodiment, the present invention is entered
Row further describes.However, it should be understood that specific embodiment described herein is only in order to explain the present invention, and without
In restriction the scope of the present invention.
A kind of processing method of anodontia bearing and bearing, the procedure of processing of described outer ring is as follows:
(1) rough turn: forging blank to be carried out clamping, correction inner circle is beated for 0-1.6mm, cylindrical beated for 0-0.5mm, root
Carry out rough turn processing according to turning process drawing, control cylindrical and inner circle diameter error is not more than 1mm, individual pen height error is not more than
0.8mm；The forging blank material trademark that the present invention adopts is 50mn.
(2) half smart cars: rough turn rear forging is carried out clamping, correction is cylindrical to beat for 0-0.2mm, according to turning process drawing
Carry out half finishing processing, control raceway diameter and the high no more than 0.3mm in ring center；Each card is should ensure that during clamping is cylindrical
Melon clamping power uniformly, and is compressed at cylindrical place with four pressing plates.
(3) heat treatment: carry out heat treatment, the profile of induction loop and raceway with the countershaft raceway that holds of induction loop
Consistent, electrified regulation, after heating certain time reaches hardening heat, fall into cooling, quenching liquid concentration in hardening media immediately
For 0.48ml/l, quenching hydraulic coupling is 0.2mpa, and control raceway hardness is 55-62hrc, and depth of hardening zone is more than 3 millimeters, afterwards
It is tempered 4h at 200 DEG C；In this preferred embodiment, electrified regulation, its voltage is 420v, electric current is 120a, linear velocity is 62mm/
Min, power are 50kw, frequency is 3600hz.
(4) smart car: bearing non-referenced face is placed on equal height cushion block, correction inner circle is beated for 0-0.1mm, uses pressing plate pressure
Tightly, finishing processing is carried out according to turning process drawing, control outside diameter, interior circular diameter and raceway centre-height error to be not more than
0.1mm, smoothness requirements are ra3.2；
(5) rule: after the overall dimensions of measurement part, rule and positioning process according to drawing regulation；
(6) hole: comparison drawing detection line size is it is ensured that carry out drilling operating again after size is correct, by bearing
Datum level is placed on radial drill workbench equal-height block, with pressing plate compression it is ensured that the steady no tilting of workpiece, center line of bit is aligned
Holed in hole center, control hole diameter error is not more than 0.1mm；
(7) oilhole: bearing is fixed on punch press, oil outlet is manufactured using punch process mode, using chamfering device,
Chamfering is processed on oilhole；
(8) assemble: part is carried out trial assembly and joins, measure preliminary clearance, according to calculating data and trial assembly clearance, then carry out
Grinding afterwards, allots final drawing regulation clearance；
(9) put in storage: part is detected and is made respective record, demagnetize, clean, pack and provide the quality certification, warehouse-in.
Present invention also offers a kind of anodontia bearing, possesses the outer ring being formed by above-mentioned processing method.
Present invention also offers a kind of processing method of anodontia bearing and bearing, the procedure of processing of described inner ring is as follows:
(1) rough turn: forging blank to be carried out clamping, correction inner circle is beated for 0-1.6mm, cylindrical beated for 0-0.5mm, root
Carry out rough turn processing according to turning process drawing, control cylindrical and inner circle diameter error is not more than 1mm, individual pen height error is not more than
0.8mm；
(2) half smart cars: rough turn rear forging is carried out clamping, correction is cylindrical to beat for 0-0.2mm, according to turning process drawing
Carry out half finishing processing, control raceway diameter and the high no more than 0.3mm in ring center；
(3) heat treatment: carry out heat treatment, the profile of induction loop and raceway with the countershaft raceway that holds of induction loop
Consistent, electrified regulation, after heating certain time reaches hardening heat, fall into cooling, quenching liquid concentration in hardening media immediately
For 0.48ml/l, quenching hydraulic coupling is 0.2mpa, and control raceway hardness is 55-62hrc, and depth of hardening zone is more than 3 millimeters, afterwards
It is tempered 4h at 200 DEG C；
(4) smart car: bearing non-referenced face is placed on equal height cushion block, correction inner circle is beated for 0-0.1mm, uses pressing plate pressure
Tightly, finishing processing is carried out according to turning process drawing, control outside diameter, interior circular diameter and raceway centre-height error to be not more than
0.1mm, smoothness requirements are ra3.2；
(5) rule: after the overall dimensions of measurement part, rule and positioning process according to drawing regulation；
(6) hole: comparison drawing detection line size is it is ensured that carry out drilling operating again after size is correct, by bearing
Datum level is placed on radial drill workbench equal-height block, with pressing plate compression it is ensured that the steady no tilting of workpiece, center line of bit is aligned
Holed in hole center, control hole diameter error is not more than 0.1mm.
Present invention also offers a kind of anodontia bearing, possesses the inner ring being formed by above-mentioned processing method.
The processing method of a kind of anodontia bearing of the present invention adopts induction heat treatment technology, is added with induction loop energising
Heat, compared with prior heat treatment technology, have process is simple, heat treatment low cost, preparation bearing partss quality good the features such as,
There is environmental protection and be finish-machined to the good size of precision.The processing method of a kind of anodontia bearing of the present invention adopts punching press
Processing mode manufactures oilhole, and compared with traditional Drilling operation mode, the oilhole of preparation has the features such as burr is few, and circularity is good,
And efficiency also improves 3-4 times.Each structural portion can be shaped using shorten leading time by described processing method
Part, if assembling bearing using the inner ring and outer ring of the present invention, is capable of the raising of production efficiency.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any modification, equivalent or improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of processing method of anodontia bearing and bearing are it is characterised in that the procedure of processing of described outer ring is as follows:
(1) rough turn: forging blank is carried out clamping, correction inner circle beat for 0-1.6mm, cylindrical beat for 0-0.5mm, according to car
Cut art work sheet and carry out rough turn processing, control cylindrical and inner circle diameter error is not more than 1mm, individual pen height error is not more than
0.8mm；
(2) half smart cars: rough turn rear forging is carried out clamping, correction is cylindrical to beat for 0-0.2mm, carries out according to turning process drawing
Half finishing processing, controls raceway diameter and the high no more than 0.3mm in ring center；
(3) heat treatment: carry out heat treatment, the profile of induction loop and raceway phase one with the countershaft raceway that holds of induction loop
Cause, electrified regulation, after heating certain time reaches hardening heat, fall into cooling in hardening media immediately, quenching liquid concentration is
0.48ml/l, quenching hydraulic coupling is 0.2mpa, and control raceway hardness is 55-62hrc, and depth of hardening zone is more than 3 millimeters, exists afterwards
It is tempered 4h at 200 DEG C；
(4) smart car: bearing non-referenced face is placed on equal height cushion block, correction inner circle is beated for 0-0.1mm, with pressing plate compression, root
Carry out finishing processing according to turning process drawing, control outside diameter, interior circular diameter and raceway centre-height error to be not more than
0.1mm, smoothness requirements are ra3.2；
(5) rule: after the overall dimensions of measurement part, rule and positioning process according to drawing regulation；
(6) hole: comparison drawing detection line size is it is ensured that carry out drilling operating again, by bearing benchmark after size is correct
Face is placed on radial drill workbench equal-height block, with pressing plate compression it is ensured that workpiece steadily no tilting, by center line of bit alignment hole
Holed in heart position, control hole diameter error is not more than 0.1mm；
(7) oilhole: bearing is fixed on punch press, oil outlet is manufactured using punch process mode, using chamfering device, in oilhole
On process chamfering；
(8) assemble: part is carried out trial assembly and joins, measure preliminary clearance, according to calculating data and trial assembly clearance, then carry out last
Grinding, allots final drawing regulation clearance；
(9) put in storage: part is detected and is made respective record, demagnetize, clean, pack and provide the quality certification, warehouse-in.
2. a kind of anodontia race bearing according to claim 1 processing technique it is characterised in that: described forging blank material
The material trade mark is 50mn.
3. a kind of anodontia race bearing according to claim 1 processing technique it is characterised in that: in step (2), dress
Should ensure that each card melon clamping power during folder is cylindrical uniformly, and compressed at cylindrical place with four pressing plates.
4. a kind of anodontia race bearing according to claim 1 processing technique it is characterised in that: in step (3), described
Electrified regulation, its voltage is 420v, electric current is 120a, linear velocity is 62mm/min, power is 50kw, frequency is 3600hz.
5. a kind of anodontia bearing is it is characterised in that possess the outer ring being formed by the processing method that described claim 1 is recorded.
6. a kind of anodontia bearing according to claim 5 it is characterised in that: described forging blank material trademark be 50mn.
7. a kind of anodontia bearing according to claim 5 it is characterised in that: in step (2), during clamping is cylindrical should
Ensure each card melon clamping power uniformly, and compressed at cylindrical place with four pressing plates.
8. a kind of anodontia bearing according to claim 5 it is characterised in that: in step (3), described electrified regulation, its electricity
Press for 420v, electric current be 120a, linear velocity be 62mm/min, power be 50kw, frequency be 3600hz.
9. a kind of processing method of anodontia bearing and bearing are it is characterised in that the procedure of processing of described inner ring is as follows:
(1) rough turn: forging blank is carried out clamping, correction inner circle beat for 0-1.6mm, cylindrical beat for 0-0.5mm, according to car
Cut art work sheet and carry out rough turn processing, control cylindrical and inner circle diameter error is not more than 1mm, individual pen height error is not more than
0.8mm；
(2) half smart cars: rough turn rear forging is carried out clamping, correction is cylindrical to beat for 0-0.2mm, carries out according to turning process drawing
Half finishing processing, controls raceway diameter and the high no more than 0.3mm in ring center；
(3) heat treatment: carry out heat treatment, the profile of induction loop and raceway phase one with the countershaft raceway that holds of induction loop
Cause, electrified regulation, after heating certain time reaches hardening heat, fall into cooling in hardening media immediately, quenching liquid concentration is
0.48ml/l, quenching hydraulic coupling is 0.2mpa, and control raceway hardness is 55-62hrc, and depth of hardening zone is more than 3 millimeters, exists afterwards
It is tempered 4h at 200 DEG C；
(4) smart car: bearing non-referenced face is placed on equal height cushion block, correction inner circle is beated for 0-0.1mm, with pressing plate compression, root
Carry out finishing processing according to turning process drawing, control outside diameter, interior circular diameter and raceway centre-height error to be not more than
0.1mm, smoothness requirements are ra3.2；
(5) rule: after the overall dimensions of measurement part, rule and positioning process according to drawing regulation；
(6) hole: comparison drawing detection line size is it is ensured that carry out drilling operating again, by bearing benchmark after size is correct
Face is placed on radial drill workbench equal-height block, with pressing plate compression it is ensured that workpiece steadily no tilting, by center line of bit alignment hole
Holed in heart position, control hole diameter error is not more than 0.1mm.
10. a kind of anodontia bearing is it is characterised in that possess the inner ring being formed by the processing method that described claim 9 is recorded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610851089.1A CN106369062B (en) | 2016-09-26 | 2016-09-26 | A kind of processing method and bearing of anodontia bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610851089.1A CN106369062B (en) | 2016-09-26 | 2016-09-26 | A kind of processing method and bearing of anodontia bearing |
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| Publication Number | Publication Date |
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| CN106369062A true CN106369062A (en) | 2017-02-01 |
| CN106369062B CN106369062B (en) | 2018-08-24 |
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ID=57898614
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610851089.1A Expired - Fee Related CN106369062B (en) | 2016-09-26 | 2016-09-26 | A kind of processing method and bearing of anodontia bearing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107520582A (en) * | 2017-08-23 | 2017-12-29 | 沈阳鼓风机集团齿轮压缩机有限公司 | The processing method and device in bearing thrust face |
| CN108857274A (en) * | 2018-06-14 | 2018-11-23 | 杭州力亿轴承有限公司 | Double channel emery wheel grinds processing method |
| CN109290744A (en) * | 2018-10-30 | 2019-02-01 | 安徽东升达精密机件有限公司 | A kind of shaft and shaft processing method |
| CN110977363A (en) * | 2019-12-27 | 2020-04-10 | 瓦房店轴承集团国家轴承工程技术研究中心有限公司 | Processing technology of inclined plane variable pitch bearing |
| CN111185724A (en) * | 2020-04-10 | 2020-05-22 | 人本集团有限公司 | Eccentric inner ring, eccentric bearing machining method, eccentric bearing and eccentric clamp |
| CN113695845A (en) * | 2021-08-10 | 2021-11-26 | 洛阳轴承研究所有限公司 | Method for machining floating ring of main drive bearing of tunneling machine |
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| CN108857274A (en) * | 2018-06-14 | 2018-11-23 | 杭州力亿轴承有限公司 | Double channel emery wheel grinds processing method |
| CN109290744A (en) * | 2018-10-30 | 2019-02-01 | 安徽东升达精密机件有限公司 | A kind of shaft and shaft processing method |
| CN110977363A (en) * | 2019-12-27 | 2020-04-10 | 瓦房店轴承集团国家轴承工程技术研究中心有限公司 | Processing technology of inclined plane variable pitch bearing |
| CN111185724A (en) * | 2020-04-10 | 2020-05-22 | 人本集团有限公司 | Eccentric inner ring, eccentric bearing machining method, eccentric bearing and eccentric clamp |
| CN113695845A (en) * | 2021-08-10 | 2021-11-26 | 洛阳轴承研究所有限公司 | Method for machining floating ring of main drive bearing of tunneling machine |
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