CN115181833A - Quenching method for double-row four-point contact ball bearing ring double-raceway surface - Google Patents
Quenching method for double-row four-point contact ball bearing ring double-raceway surface Download PDFInfo
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- CN115181833A CN115181833A CN202210854503.XA CN202210854503A CN115181833A CN 115181833 A CN115181833 A CN 115181833A CN 202210854503 A CN202210854503 A CN 202210854503A CN 115181833 A CN115181833 A CN 115181833A
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- 238000010791 quenching Methods 0.000 title claims abstract description 116
- 230000000171 quenching effect Effects 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000006698 induction Effects 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims description 66
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 46
- 229910052802 copper Inorganic materials 0.000 claims description 46
- 239000010949 copper Substances 0.000 claims description 46
- 239000000110 cooling liquid Substances 0.000 claims description 35
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 21
- 238000005496 tempering Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000004381 surface treatment Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention relates to a quenching method for the surface of double raceways of a double-row four-point contact ball bearing ring, which relates to the technical field of bearings, and is characterized in that a double-raceway intermediate frequency quenching inductor is used for quenching the surfaces of raceways on an inner ring (1) or an outer ring (2), the hardness and the depth of a hardened layer after the surface of the raceways on the inner ring or the outer ring is quenched meet the design requirements by selecting proper surface quenching process parameters, and simultaneously, the double-raceway intermediate frequency quenching inductor can simultaneously quench two raceways on the inner ring or the outer ring, so that the quenching time can be effectively reduced, the adjusting time of the inner ring or the outer ring in the processing process is also reduced, the production efficiency of intermediate frequency induction quenching of the raceways is effectively improved, the production cost is reduced, and the method is suitable for large-scale popularization and application.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to a quenching method for double raceway surfaces of a double-row four-point contact ball bearing ring, and specifically relates to a quenching method for the double raceway surfaces of a 42CrMo double-row four-point contact ball bearing ring.
Background
As is known, a double-row four-point contact ball bearing (500-2000 mm) ring is provided with two rows of raceways, the material of the ring is 42CrMo, the raceways of the ring need medium-frequency induction surface quenching, and the bearing capacity of the double-row four-point contact ball bearing is much higher than that of a single-row four-point contact ball bearing in the same overall dimension, so that the double-row four-point contact ball bearing is favored by customers. The double-row four-point contact ball bearing is mainly applied to the mining machinery industry, and the market demand is large.
At present, two rows of raceways of a double-row four-point contact ball bearing ring need to be subjected to medium-frequency induction surface quenching one by one, the medium-frequency induction surface quenching processing efficiency of the raceways is low, and the market demand cannot be met. The market often cannot accommodate supplies for cost or lead time reasons. Therefore, how to provide the quenching method for the surface of the double-row four-point contact ball bearing ring double-raceway surface, which can improve the medium-frequency induction surface quenching production efficiency of the double-row four-point contact ball bearing ring raceway and also can reduce the production cost, becomes a long-term technical demand of technical personnel in the field.
Disclosure of Invention
In order to overcome the defects in the background technology, the invention provides a quenching method for the surface of the double roller path of the double-row four-point contact ball bearing ring, which can effectively reduce the production cost and the like while improving the production efficiency of medium-frequency induction surface quenching of the roller path of the double-row four-point contact ball bearing ring.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a quenching method for the surface of double-row four-point contact ball bearing ring double roller paths includes such steps as putting the inner or outer ring of said double-row four-point contact ball bearing on the rotary platform of medium-frequency induction quenching equipment, clamping, aligning, putting the heated copper tube of medium-frequency quenching inductor in the roller path of inner or outer ring, regulating the distance between the medium-frequency quenching inductor and the roller path of inner or outer ring, setting the heating power of medium-frequency quenching inductor, induction heating the roller path of inner or outer ring, rotating the inner or outer ring when the roller path of inner or outer ring reaches the phase-change temp., opening the cooling liquid box on the medium-frequency quenching inductor, spraying cooling liquid to cool the roller path of inner or outer ring, rotating the inner or outer ring by one turn, quenching the surface of roller path of inner or outer ring, detecting the hardness and hardening depth of roller path, and tempering for 4-8 hr.
In the quenching method for the double-raceway surface of the double-row four-point contact ball bearing ring, the heating power of the intermediate frequency quenching inductor is 35-45 KW.
The quenching method of the double-raceway surface of the double-row four-point contact ball bearing ring is characterized in that the phase transition temperature of the raceway is 860-920 ℃.
According to the quenching method for the double-raceway surface of the double-row four-point contact ball bearing ring, the coupling gap between the intermediate frequency quenching inductor and the inner ring or the outer ring upper raceway is 1-2 mm.
In the quenching method for the double-raceway surface of the double-row four-point contact ball bearing ring, the rotating speed of the inner ring or the outer ring is 120-180 mm/min.
The quenching method for the double-raceway surface of the double-row four-point contact ball bearing ring comprises the steps that the concentration of cooling liquid is 15-20%, and the temperature of the cooling liquid is 25-35 ℃.
The quenching method for the double-row four-point contact ball bearing ring double-raceway surface is characterized in that the intermediate frequency quenching inductor is a double-raceway intermediate frequency quenching inductor, the double-raceway intermediate frequency quenching inductor comprises two groups of heating units, heating copper pipes in the two groups of heating units correspond to each other one by one, one of the two groups of heating units is preheated, the heating units comprise heating copper pipes, silicon steel sheets and cooling liquid boxes, the two groups of heating copper pipes are arranged in parallel and at intervals, the two heating copper pipes are respectively bent to form shapes consistent with the shapes of raceways on an inner ring or an outer ring, two groups of silicon steel sheets are arranged between the two heating copper pipes and arranged at intervals, a group of silicon steel sheets are respectively arranged on the outer sides of the two heating copper pipes, a cooling liquid box is arranged on the outer side of the silicon steel sheet on any one heating copper pipe, and the cooling liquid box is externally connected with a cooling source.
According to the quenching method for the double-raceway surface of the double-row four-point contact ball bearing ring, the cross section of the heating copper pipe is a square copper pipe with the size of 8mm multiplied by 8 mm.
According to the quenching method for the double-raceway surface of the double-row four-point contact ball bearing ring, the thickness of a silicon steel sheet is 1.5mm, and the appearance of the silicon steel sheet is consistent with that of the inner ring or the outer ring upper raceway.
According to the quenching method for the double-raceway surface of the double-row four-point contact ball bearing ring, the cooling liquid box is formed by welding copper plates with the thickness of 1mm, and a plurality of liquid spraying holes are formed in the cooling liquid box.
By adopting the technical scheme, the invention has the following advantages:
the invention uses the double-raceway medium-frequency quenching inductor to carry out surface quenching on the raceways of the inner ring or the outer ring, the hardness and the depth of a hardened layer after the surface quenching of the raceways of the inner ring or the outer ring meet the design requirements by selecting proper surface quenching process parameters, and simultaneously, the double-raceway medium-frequency quenching inductor can simultaneously quench two raceways of the inner ring or the outer ring, thereby effectively reducing the quenching time, reducing the adjustment time of the inner ring or the outer ring in the processing process, effectively improving the production efficiency of the medium-frequency quenching of the raceways, reducing the production cost and the like, and being suitable for large-scale popularization and application.
Drawings
FIG. 1 is a schematic structural diagram of a double-row four-point contact ball bearing in the present invention;
FIG. 2 is a schematic perspective view of an intermediate frequency quenching inductor according to the present invention;
in the figure: 1. an inner ring; 2. an outer ring; 3. a steel ball; 4. a plug; 5. a taper pin; 6. a seal ring; 7. heating the copper pipe; 8. silicon steel sheets; 9. and a coolant box.
Detailed Description
The present invention will be explained in more detail by the following examples, which are not intended to limit the present invention;
in the description of the present invention, it is to be understood that the terms "central," "lateral," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "side," and the like are used in the indicated orientations and positional relationships, based on the orientation or positional relationship shown in the drawings, for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
With reference to fig. 1-2, the quenching method of the double row four-point contact ball bearing ring double raceway surface is that firstly, an inner ring 1 or an outer ring 2 in the double row four-point contact ball bearing is placed on a rotary platform of a medium frequency induction quenching device and clamped and aligned, then a heating copper pipe 7 of a medium frequency quenching inductor is placed in a raceway of the inner ring 1 or the outer ring 2 in the double row four-point contact ball bearing, the distance between the medium frequency quenching inductor and the raceway on the inner ring 1 or the outer ring 2 is adjusted, the heating power of the medium frequency quenching inductor is set, induction heating is performed on the raceway on the inner ring 1 or the outer ring 2, when the raceway of the inner ring 1 or the outer ring 2 reaches a phase transition temperature, the inner ring 1 or the outer ring 2 is rotated, a cooling liquid box 9 on the medium frequency quenching inductor is opened, cooling liquid is sprayed on the raceway of the inner ring 1 or the outer ring 2 by the cooling liquid box 9, and after the inner ring 1 or the outer ring 2 rotates for one circle, the raceway surface of the inner ring 1 or the outer ring 2 is quenched, and in specific implementation, the heating power of the medium frequency quenching inductor is 35-45 KW; the phase transition temperature of the raceway is 860-920 ℃; the coupling gap between the intermediate frequency quenching inductor and the raceway on the inner ring 1 or the outer ring 2 is 1-2 mm, namely the coupling gap between the heating copper pipe 7 on the intermediate frequency quenching inductor and the raceway on the inner ring 1 or the outer ring 2 is 1-2 mm; the rotating speed of the inner ring 1 or the outer ring 2 is 120-180 mm/min; the concentration of the cooling liquid is 15-20%, and the temperature of the cooling liquid is 25-35 ℃; and detecting the hardness and hardening depth of the raceway, and finally carrying out tempering stabilization treatment after finishing surface quenching, wherein the tempering temperature is 150-200 ℃ and the time is 4-8 hours.
During specific implementation, because the inner ring 1 and the outer ring 2 of the double-row four-point contact ball bearing are both provided with the two peach-shaped rolling paths, when the intermediate frequency quenching inductor is designed, according to the profiling design of the two rolling paths, the heating and cooling of the intermediate frequency quenching inductor can be carried out along the two peach-shaped rolling paths, the requirement of simultaneous intermediate frequency induction quenching of the two rolling paths is met, the heating part is provided with the preheating part and the heating part, and the depth of a quenching hardening layer is effectively improved. The heating copper tube 7 on the intermediate frequency quenching inductor adopts a copper tube with the diameter of 8 multiplied by 8mm to form a peach-shaped raceway shape through bending, then a silicon steel sheet 8 with the thickness of 1.5mm is inserted, and the shape of the silicon steel sheet 8 is polished to enable the heating part of the inductor to be consistent with the raceways on the inner ring 1 and the outer ring 2. The cooling liquid box 9 on the intermediate frequency quenching inductor is formed by welding copper plates with the thickness of 1mm, and liquid spraying holes are processed on the cooling liquid box 9 to ensure sufficient cooling.
In specific implementation, as shown in fig. 2, the intermediate frequency quenching inductor is a double-raceway intermediate frequency quenching inductor, the double-raceway intermediate frequency quenching inductor includes two groups of heating units, the heating copper pipes 7 in the two groups of heating units are in one-to-one correspondence, that is, as shown in fig. 2, the two groups of heating units are arranged correspondingly, so that the purpose that the raceway is preheated and reheated by the heating copper pipes 7 in the two groups of heating units can be realized, one of the two groups of heating units is preheated, the other group of heating units is heated, so that the double raceway is preheated and reheated first, each heating unit includes a heating copper pipe 7, a silicon steel sheet 8 and a cooling liquid box 9, the two groups of heating copper pipes 7 are arranged in pairs, the size of the cross section of the heating copper pipes 7 is a square copper pipe 8mm × 8mm, the two heating copper pipes 7 are arranged in parallel and at intervals, the two heating copper pipes 7 are bent to form a shape consistent with the contour of the raceway on the inner ring 1 or the outer ring 2, two groups of heating copper pipes 8 are arranged at intervals, and the outer ring 7 is cooled by a cooling medium, the silicon steel sheet is prevented from being melted on the inner ring 1.5mm, and the copper pipe 1 or the outer ring 1; the outer side of a silicon steel sheet 8 on the outer side of any heating copper pipe 7 is provided with a cooling liquid box 9, the cooling liquid box 9 is externally connected with a cooling source, the cooling liquid box 9 is formed by welding copper plates with the thickness of 1mm during implementation, and the cooling liquid box 9 is provided with a plurality of liquid spraying holes.
In order to overcome the defects of the background technology, the invention firstly designs the double-roller intermediate frequency quenching inductor which can simultaneously quench the double rollers of the inner ring 1 or the outer ring 2, sets the intermediate frequency induction surface quenching parameters and meets the hardness and hardened layer depth of the roller path product design of the inner ring 1 or the outer ring 2. The medium-frequency induction surface quenching production efficiency of the double-row four-point contact ball bearing ring raceway is improved, and the production cost can be reduced.
In the specific implementation of the invention, taking a bearing with the inner diameter of phi 1100mm as an example, a raceway between an inner ring 1 and an outer ring 2 of the bearing is respectively provided with a steel ball 3, the outer edge surface of the outer ring 2 is provided with at least one steel ball through hole communicated to the raceway, a plug 4 is arranged in the steel ball through hole, the lower end surface of the outer ring 2 is provided with a pin hole communicated to the upper end surface of the outer ring 2, a taper pin 5 is arranged in the pin hole, two ends of the upper end between the inner ring 1 and the outer ring 2 are respectively provided with a sealing ring 6, the structural design of the inductor for double-row four-point contact ball bearing inner ring 1 or double-raceway surface quenching on the outer ring 2, the manufacture of the inductor and the double-raceway intermediate frequency induction quenching process are as follows:
1. the structure design of the medium frequency quenching inductor:
the inner ring 1 and the outer ring 2 of the double-row four-point contact ball bearing are both provided with two peach-shaped roller paths, the appearance of the heating copper pipe 7 and the appearance of the silicon steel sheet 8 are designed according to the copying of the two roller paths when the intermediate frequency quenching inductor is manufactured, the heating and cooling of the intermediate frequency quenching inductor can be carried out along the two peach-shaped roller paths, the requirement of intermediate frequency induction quenching of the two roller paths is met, the heating unit is provided with two preheating units and two heating units, and the depth of a quenching hardening layer is effectively improved.
2. Manufacture of medium frequency quenching inductor
A heating copper pipe 7 in the intermediate frequency quenching inductor adopts an 8 x 8mm copper pipe to form a peach-shaped roller path shape through bending or welding, a silicon steel sheet 8 with the thickness of 1.5mm is inserted into the surface of the heating copper pipe, and the shape of the silicon steel sheet 8 is polished to enable the heating part of the intermediate frequency quenching inductor to be consistent with a channel of intermediate frequency induction quenching. The cooling liquid box 9 on the intermediate frequency quenching inductor is formed by welding copper plates with the thickness of 1mm, and liquid spraying holes are processed on the cooling liquid box 9 to ensure sufficient cooling.
3. Double-raceway medium-frequency induction quenching process
And placing the medium-frequency quenching inductor in the roller path, adjusting the power of quenching equipment to heat the inductor, enabling the roller path of the inner ring 1 or the roller path of the outer ring 2 to reach the phase transition temperature, rotating the inner ring 1 or the outer ring 2, and cooling the sprayed liquid of the cooling liquid box 9. The medium frequency surface quenching parameters are shown in the following table, and are selected according to the depth of a quenching hardened layer, and the quenching power is 35-45 KW; the surface quenching temperature is 860 to 920 ℃; the concentration of the cooling liquid is 15-20%, and the temperature is 25-35 ℃; quenching coupling clearance is 1-2 mm; the rotating speed of the workpiece is 120-180 mm/min. After surface quenching, tempering and stabilizing treatment are required, wherein the tempering temperature is 170 ℃ and the tempering time is 4-8 hours.
Roller path intermediate frequency quenching parameter meter
The present invention is not described in detail in the prior art.
The embodiments selected for the purpose of disclosing the invention, are presently considered to be suitable, it being understood, however, that the invention is intended to cover all variations and modifications of the embodiments which fall within the spirit and scope of the invention.
Claims (10)
1. A quenching method for the double raceway surfaces of a double-row four-point contact ball bearing ring is characterized by comprising the following steps: the quenching method comprises the steps of firstly placing an inner ring (1) or an outer ring (2) in the double-row four-point contact ball bearing on a rotary platform of medium-frequency induction quenching equipment, clamping and aligning, then placing a heating copper pipe (7) of a medium-frequency quenching inductor in a raceway of the inner ring (1) or the outer ring (2) in the double-row four-point contact ball bearing, adjusting the distance between the medium-frequency quenching inductor and the raceway on the inner ring (1) or the outer ring (2), setting the heating power of the medium-frequency quenching inductor, carrying out induction heating on the raceway on the inner ring (1) or the outer ring (2), rotating the inner ring (1) or the outer ring (2) after the raceway of the inner ring (1) or the outer ring (2) reaches a phase transition temperature, opening a cooling liquid box (9) on the medium-frequency quenching inductor, spraying cooling liquid on the cooling liquid box (9) to cool the raceway of the inner ring (1) or the outer ring (2), carrying out tempering treatment after the inner ring (1) or the outer ring (2) rotates for one circle, completing the surface quenching treatment, detecting the hardness and the depth of the raceway, and carrying out tempering treatment after the surface treatment, wherein the tempering treatment is carried out the tempering treatment at a tempering temperature of 150-8 ℃ to-8 ℃ after the tempering treatment is completed.
2. The quenching method for the double raceway surface of the double row four point contact ball bearing ring according to claim 1, characterized in that: the heating power of the intermediate frequency quenching inductor is 35-45 KW.
3. The quenching method for the double raceway surface of the double row four point contact ball bearing ring according to claim 1, characterized in that: the phase transition temperature of the raceway is 860-920 ℃.
4. The quenching method for the double-row four-point contact ball bearing ring double-raceway surface as claimed in claim 1, characterized in that: the coupling gap between the intermediate frequency quenching inductor and the inner ring (1) or the upper raceway of the outer ring (2) is 1-2 mm.
5. The quenching method for the double raceway surface of the double row four point contact ball bearing ring according to claim 1, characterized in that: the rotating speed of the inner ring (1) or the outer ring (2) is 120-180 mm/min.
6. The quenching method for the double-row four-point contact ball bearing ring double-raceway surface as claimed in claim 1, characterized in that: the concentration of the cooling liquid is 15-20%, and the temperature of the cooling liquid is 25-35 ℃.
7. The quenching method for the double raceway surface of the double row four point contact ball bearing ring according to claim 1, characterized in that: the medium-frequency quenching inductor is a double-raceway medium-frequency quenching inductor, the double-raceway medium-frequency quenching inductor comprises two groups of heating units, heating copper pipes (7) in the two groups of heating units correspond to each other one by one, one group of the two groups of heating units is pre-heated, each heating unit comprises a heating copper pipe (7), silicon steel sheets (8) and a cooling liquid box (9), the heating copper pipes (7) are arranged in two groups, the two heating copper pipes (7) are parallel to each other and are arranged at intervals, the two heating copper pipes (7) are respectively bent to form shapes consistent with the shapes of the upper raceways of the inner ring (1) or the outer ring (2), two groups of silicon steel sheets (8) are arranged between the two heating copper pipes (7), the two groups of silicon steel sheets (8) are arranged at intervals, a group of silicon steel sheets (8) are respectively arranged on the outer sides of the two heating copper pipes (7), the cooling liquid box (9) is arranged on the outer sides of any heating copper pipes (7), and a cooling liquid box (9) is externally connected with a cooling source.
8. The quenching method for the double-row four-point contact ball bearing ring double-raceway surface as claimed in claim 7, characterized in that: the cross section of the heating copper pipe (7) is a square copper pipe with the size of 8mm multiplied by 8 mm.
9. The quenching method for the double-row four-point contact ball bearing ring double-raceway surface as claimed in claim 7, characterized in that: the thickness of the silicon steel sheet (8) is 1.5mm, and the appearance of the silicon steel sheet (8) is consistent with that of the upper raceway of the inner ring (1) or the outer ring (2).
10. The quenching method for the double-row four-point contact ball bearing ring double-raceway surface as claimed in claim 7, characterized in that: the cooling liquid box (9) is formed by welding copper plates with the thickness of 1mm, and a plurality of liquid spraying holes are formed in the cooling liquid box (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210854503.XA CN115181833A (en) | 2022-07-20 | 2022-07-20 | Quenching method for double-row four-point contact ball bearing ring double-raceway surface |
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| CN202210854503.XA CN115181833A (en) | 2022-07-20 | 2022-07-20 | Quenching method for double-row four-point contact ball bearing ring double-raceway surface |
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2022
- 2022-07-20 CN CN202210854503.XA patent/CN115181833A/en active Pending
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| CN108559819A (en) * | 2017-12-25 | 2018-09-21 | 江苏大学 | The laser transformation hardening method and processing unit (plant) of variable pitch/yaw bearing lasso raceway |
| CN108220581A (en) * | 2018-02-05 | 2018-06-29 | 洛阳新强联回转支承股份有限公司 | It is a kind of without soft band four-point contact ball pivoting support bearing |
| CN109082504A (en) * | 2018-08-28 | 2018-12-25 | 洛阳Lyc轴承有限公司 | A kind of super-huge 42CrMo double-split bearing ring raceway face process for quenching |
| CN113174466A (en) * | 2021-04-30 | 2021-07-27 | 洛阳Lyc轴承有限公司 | Induction quenching method for 40Cr15Mo2VN high-nitrogen stainless bearing steel |
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