CN107931986B - Method for processing bearing outer ring with single-side flange - Google Patents
Method for processing bearing outer ring with single-side flange Download PDFInfo
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- CN107931986B CN107931986B CN201711142802.6A CN201711142802A CN107931986B CN 107931986 B CN107931986 B CN 107931986B CN 201711142802 A CN201711142802 A CN 201711142802A CN 107931986 B CN107931986 B CN 107931986B
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- 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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Abstract
The method comprises the steps of taking forged and annealed bar stock or pipe stock as a raw material, cutting the raw material into a blank of the bearing outer ring, and performing early cutting to form a symmetrical semi-finished product of the bearing outer ring; then turning the outer circle (3) of the bearing outer ring to form a flange (1); the method is characterized in that all grinding machining of planes (5) on two sides of the bearing outer ring is finished before the flange (1) is turned, and all grinding machining of the planes (5) on the two sides of the bearing outer ring adopts a grinding mode that two sides are symmetrical at the same time; the defect that the depth of the dustproof grooves on the two sides has an obvious linear difference value in the original process is overcome, and the final depth of the dustproof grooves (2) on the two sides is consistent.
Description
Technical Field
The invention relates to a method for processing a bearing outer ring with a unilateral flange and a symmetrical dustproof groove.
Background
The bearing is used as a basic standard component of modern industrial machinery, has wide application and is greatly required. Bearing manufacturing techniques are well established. For dust prevention, dust covers are generally arranged on two sides of the bearing; in order to install the dust cap, the bearing outer ring needs to be symmetrically grooved, and the groove is generally called a dust-proof groove in the industry because the groove is used for installing the dust cap.
When the bearing is manufactured, the outer surface of the bearing outer ring needs to be ground, and two side surfaces of the bearing outer ring are generally ground symmetrically at the same time. For the bearing outer ring with the two side surfaces in a symmetrical shape and structure, simultaneous symmetrical grinding is adopted, the grinding of the two side surfaces starts and ends simultaneously, the two side surfaces are stressed symmetrically during grinding, and the grinding consistency is good; the clamping is convenient and stable, the processing precision is high, and the operating efficiency is high; therefore, the advantages are numerous and the effect is very outstanding.
The existing processing technology of the bearing outer ring is to finish turning and rough grinding of a bearing outer ring blank which is forged and annealed and is symmetrical on two sides, then to carry out quenching and tempering heat treatment, and then to carry out finish grinding processing of an outer circle and two side faces.
The bearing with the single-side flange on the outer ring of the bearing is used as a bearing branch type with a single-side positioning function, the bearing is wide in application, the bearing has a high occupation ratio at present, and the required amount is large. The existing processing technology of the bearing outer ring with the single-side flange is shown in fig. 3, and the processing steps are continued to be used, namely, the outer ring is turned on a bearing outer ring blank to form the single-side flange, then quenching and tempering heat treatment are carried out, and then two side faces are symmetrically ground at the same time. The inventor finds that the depth difference of dust grooves on two sides of the bearing outer ring with the single-side flange manufactured by the process is obvious, and a remarkable linear difference exists, the depth b1 of the dust grooves on the non-flange side is obviously smaller than the depth b2 of the dust grooves on the flange side, most of products b 2-b 1= 0.05-0.10 mm, and a small number of products b 2-b 1 are larger than 0.10mm, so that the interference between a bearing dust cover and an inner retainer is easily caused, or the interference between the bearing and an external part is caused because the dust cover is higher than a side plane. The reason for this is that when the bearing outer ring with the single-side flange adopts the two side faces to be ground symmetrically at the same time, as the two side faces are asymmetric, as shown in fig. 3, after the single-side flange is formed by turning, the wall thickness 1 of the non-flange side is obviously smaller than the wall thickness 2 of the bearing outer ring of the flange side, and the stress areas are different during grinding, so that the grinding stress states of the two side faces are different, the grinding depths of the two side faces are different, and the grinding depth of the non-flange end is obviously larger than that of the flange end; so that the dust groove depth b1 on the non-flange side is significantly less than the dust groove depth b2 on the flange side, with a significant linear difference therebetween. However, if the two side surfaces are ground separately, the two side surfaces need to be clamped separately, and it is more difficult to accurately grasp the respective grinding force receiving states and grinding amounts, and the work efficiency is low.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for processing a bearing outer ring with a unilateral flange and a symmetrical dustproof groove.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a processing method of a bearing outer ring with a single-side flange (1) is characterized in that the bearing outer ring is also provided with a symmetrical dustproof groove (2), the processing method of the bearing outer ring takes a bar material or a pipe material subjected to forging annealing as a raw material, the bar material or the pipe material is cut into a bearing outer ring blank, and a symmetrical bearing outer ring semi-finished product is formed through cutting processing in the early stage; turning the outer circle (3) of the bearing outer ring to form a flange (1); the grinding method is characterized in that all grinding of the planes (5) on the two sides of the bearing outer ring is finished before the flange (1) is formed through turning, and all grinding of the planes (5) on the two sides of the bearing outer ring adopt a grinding mode that the two sides are symmetrical at the same time.
The following are further schemes, respectively:
the machining of earlier stage is including the turning excircle (3), hole (4), both sides plane (5) of bearing inner race blank the turning bearing inner race forms dust groove (2) that the symmetry set up.
The machining in the early stage further comprises a grinding mode of simultaneous symmetry of two sides, namely a rough grinding mode and a rough grinding mode, wherein the rough grinding mode is used for roughly grinding planes (5) on two sides of the bearing outer ring (3).
The processing method of the bearing outer ring comprises the following specific processing steps:
turning an outer circle (3), an inner hole (4) and two side planes (5) of the bearing outer ring out of sequence, and then performing rough grinding on the outer circle (3) of the bearing outer ring and simultaneous symmetrical rough grinding on the two side planes (5) out of sequence;
turning the outer ring of the bearing to form symmetrically arranged dustproof grooves (2);
step three, finishing the simultaneous symmetrical fine grinding of the planes (5) on the two sides of the bearing outer ring at one time;
turning the outer circle (3) of the bearing outer ring to form a flange (1);
fifthly, carrying out quenching treatment and tempering treatment on the bearing outer ring in sequence;
and step six, finishing rough grinding and fine grinding of the secondary outer circle (6) after turning in the step four of the bearing outer ring.
And in the fifth step, the quenching treatment is vacuum quenching treatment, and the tempering treatment is oil tempering treatment.
The sixth step further comprises the rough grinding and/or the fine grinding of the small side surface (7) of the flange (1) and the fine grinding of the outer circle (3) of the flange (1).
According to the invention, all grinding processing of planes on two sides of the bearing outer ring is completed before the flange 1 is turned, and the grinding processing of the planes on two sides of the bearing outer ring all adopts a grinding mode of simultaneous symmetry on two sides. The method completely overcomes the defects that the depth of the dustproof groove at the non-flange side is obviously smaller than that of the dustproof groove at the flange side and an obvious linear difference exists between the two, and ensures that the final depths of the dustproof grooves at the two sides are consistent. The invention gives full play to the advantages of adopting simultaneous symmetrical grinding, grinding the two side surfaces simultaneously starts and ends, the two side surfaces are symmetrically stressed when being ground, and the grinding consistency is good; the clamping is convenient and stable, the processing precision is high, and the operating efficiency is high; therefore, the advantages are numerous and the effect is very outstanding.
Drawings
FIG. 1 is a schematic view of a symmetrical bearing outer race blank;
FIG. 2 is a schematic view of a finished bearing cup of the present invention;
FIG. 3 is a schematic view of a conventional process;
FIG. 4 is a schematic view of the processing method of the present invention.
Detailed Description
The following describes a specific embodiment of the present invention, as shown in fig. 1 to 4.
FIG. 1 is a schematic diagram of a forged and annealed symmetrical bearing outer ring blank to be processed according to the present invention; FIG. 2 is a schematic view of the finished bearing outer race of the present invention.
The invention aims at the processing method of the bearing outer ring with the unilateral flange 1 and the symmetrical dustproof groove 2, a bar material or a pipe material after forging and annealing is taken as a raw material, a bearing outer ring blank is cut off, and a symmetrical bearing outer ring semi-finished product is formed through the early-stage cutting processing; then turning the outer circle 3 of the bearing outer ring to form a flange 1; and finishing all grinding of the planes 5 on the two sides of the bearing outer ring before turning to form the flange 1, wherein the grinding of the planes 5 on the two sides of the bearing outer ring all adopts a grinding mode of simultaneously symmetrical two sides. That is, after the flange 1 is turned, the plane 5 on both sides of the bearing outer ring is not ground in a grinding mode of simultaneous symmetry on both sides. The early-stage cutting machining comprises the steps of turning an outer circle 3, an inner hole 4 and two side planes 5 of a bearing outer ring blank, and turning the bearing outer ring to form symmetrically arranged dust-proof grooves (2). Or, the previous cutting process further comprises the step of roughly grinding the planes 5 at the two sides in a grinding mode of simultaneously and symmetrically grinding the outer circle 3 of the bearing outer ring.
The processing method of the bearing outer ring of the invention, as shown in figure 4, comprises the following specific processing steps after cutting into a bearing outer ring blank:
turning an outer circle 3, an inner hole 4 and two side planes 5 of a bearing outer ring out of order, and then carrying out simultaneous symmetrical rough grinding and outer circle 3 rough grinding on the two side planes 5 of the bearing outer ring out of order;
turning an outer ring of the bearing to form symmetrically arranged dustproof grooves 2;
step three, finishing symmetrical fine grinding of planes 5 on two sides of the bearing outer ring at one time;
turning an outer circle 3 of the bearing outer ring to form a flange 1;
step five, carrying out quenching treatment and tempering treatment on the bearing outer ring in sequence;
and step six, finishing rough grinding and fine grinding of the secondary excircle 6 after turning in the step four of the bearing outer ring.
As the bearing outer ring is subjected to quenching and tempering heat treatment, oxidation and decarburization phenomena can be generated on the surface of the bearing outer ring, and the appearance quality of the bearing outer ring is influenced. The prior art process removes its outer surface by subsequent grinding. The invention does not carry out grinding processing on the planes 5 on the two sides of the bearing outer ring after heat treatment. In order to overcome the adverse effect of the heat treatment on the appearance quality of the outer surface of the steel plate, the quenching treatment in the fifth step is preferably vacuum quenching treatment, and the tempering treatment is preferably oil tempering treatment. In this way, the adverse effect of the heat treatment on the appearance quality of the outer surface thereof can be effectively avoided.
Wherein, the sixth step further comprises the rough grinding and/or the fine grinding of the small side surface 7 of the flange 1 and the fine grinding of the outer circle 3 of the flange 1.
As shown in fig. 3 and 4, in the method for processing the bearing outer ring with the single-side flange 1 and the symmetrical dust-proof grooves 2, a symmetrical bearing outer ring blank subjected to forging annealing is used as a raw material, the thickness of a processed target bearing outer ring is B, the thickness of the blank is B + H, and H is the total thickness cutting allowance, after the dust-proof grooves 2 symmetrically arranged are formed by turning the bearing outer ring, the final thicknesses of the dust-proof grooves 2 on the two sides after cutting are B1 and B2 respectively, and the thicknesses of the dust-proof grooves 2 on the two sides in the blank are B1+ H/2 and B2+ H/2 respectively. Ideally, the target thickness of the dust grooves 2 on both sides is the same, i.e., b1= b2, and the cutting allowance of the dust grooves 2 on both sides is H/2. Before the excircle 3 of the bearing outer ring is turned to form the flange 1, the thickness 1 of two side walls is the same as the thickness 2 of the walls; after the flange 1 is formed by turning the outer circle 3 of the bearing outer ring, the wall thickness 1 of the cut side is obviously smaller than the wall thickness 2 of the flange side of the uncut side.
The prior art processing technology is shown in figure 3, and comprises the steps of turning an outer ring of a bearing outer ring blank to form a single-side flange, quenching and tempering for heat treatment, and then symmetrically grinding two side faces simultaneously, wherein the grinding stress states of the two side faces are different due to different stress areas during grinding, so that the grinding depths of the two side faces are different, and the grinding depth of a non-flange end is obviously greater than that of a flange end; resulting in dimension b1 being significantly smaller than b 2. The interference between the bearing dust cover and the inner retainer is easily caused, or the interference between the bearing and external parts is caused because the dust cover is higher than the side plane.
As shown in figure 4, the invention finishes all grinding processing of the plane 5 at two sides of the bearing outer ring before turning to form the flange 1, and the grinding processing of the plane 5 at two sides of the bearing outer ring adopts a grinding mode of simultaneous symmetry at two sides. The defects that grinding depths of two side surfaces are different, the grinding depth of a non-flange end is obviously greater than that of a flange end, and an obvious linear difference exists between the two grinding depths are completely overcome, wherein the two grinding depths are caused by simultaneous symmetrical grinding of the two side surfaces after a single-side flange is formed by the processing technology in the prior art; the final depth of the two side dust protection grooves 2 is made uniform, i.e. b1= b 2. By adopting the process method, the linear difference value of the final depths of the dust-proof grooves 2 at the two sides is changed into a random difference value, and the depth difference of the two side surfaces can be ensured to be within the range of 0-0.05 mm through batch trial production detection. The invention gives full play to the advantages of adopting simultaneous symmetrical grinding, grinding the two side surfaces simultaneously starts and ends, the two side surfaces are symmetrically stressed when being ground, and the grinding consistency is good; the clamping is convenient and stable, the processing precision is high, and the operating efficiency is high; therefore, the advantages are numerous and the effect is very outstanding.
Claims (6)
1. A processing method of a bearing outer ring with a single-side flange (1) is characterized in that the bearing outer ring is also provided with a symmetrical dustproof groove (2), the processing method of the bearing outer ring takes a bar material or a pipe material subjected to forging annealing as a raw material, the bar material or the pipe material is cut into a bearing outer ring blank, and a symmetrical bearing outer ring semi-finished product is formed through cutting processing in the early stage; turning the outer circle (3) of the bearing outer ring to form a flange (1); the grinding method is characterized in that all grinding of the planes (5) on the two sides of the bearing outer ring is finished before the flange (1) is formed through turning, and all grinding of the planes (5) on the two sides of the bearing outer ring adopt a grinding mode that the two sides are symmetrical at the same time.
2. The processing method of the bearing outer ring according to claim 1, wherein the previous cutting processing comprises turning the outer circle (3), the inner hole (4) and two side planes (5) of the bearing outer ring blank, and the turning of the bearing outer ring forms the symmetrically arranged dustproof grooves (2).
3. The method for machining a bearing outer ring according to claim 1, wherein the previous machining further comprises rough grinding of the two side planes (5) and rough grinding of the outer circle (3) of the bearing outer ring in a grinding manner symmetrical on both sides simultaneously.
4. The method for processing the bearing outer ring according to claim 1, wherein the method comprises the following specific processing steps after cutting into the bearing outer ring blank:
turning the outer circle (3), the inner hole (4) and the two side planes (5) of the bearing outer ring blank in a non-sequential manner, and then performing simultaneous symmetrical rough grinding and outer circle (3) rough grinding on the two side planes (5) of the bearing outer ring;
turning the outer ring of the bearing to form symmetrically arranged dustproof grooves (2);
step three, finishing the simultaneous symmetrical fine grinding of the planes (5) on the two sides of the bearing outer ring at one time;
turning the outer circle (3) of the bearing outer ring to form a flange (1);
fifthly, carrying out quenching treatment and tempering treatment on the bearing outer ring in sequence;
and step six, finishing rough grinding and fine grinding of the secondary outer circle (6) after turning in the step four of the bearing outer ring.
5. The method for processing a bearing outer ring according to claim 4, wherein the quenching treatment in the fifth step is vacuum quenching treatment, and the tempering treatment is oil tempering treatment.
6. The method for processing the bearing outer ring according to claim 4, wherein the sixth step further comprises rough grinding or rough grinding and finish grinding of the small side face (7) of the flange (1) and finish grinding of the outer circle (3) of the flange (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711142802.6A CN107931986B (en) | 2017-11-17 | 2017-11-17 | Method for processing bearing outer ring with single-side flange |
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| CN201711142802.6A CN107931986B (en) | 2017-11-17 | 2017-11-17 | Method for processing bearing outer ring with single-side flange |
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| CN107931986A CN107931986A (en) | 2018-04-20 |
| CN107931986B true CN107931986B (en) | 2020-04-17 |
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| CN112008346B (en) * | 2020-09-02 | 2022-03-18 | 浙江金沃精工股份有限公司 | High-precision deep groove ball bearing outer ring machining method |
| CN112458271A (en) * | 2020-11-06 | 2021-03-09 | 中国航发哈尔滨轴承有限公司 | Method for reducing heat treatment deformation of special-shaped structure bearing ring |
| CN114749871B (en) * | 2022-04-19 | 2023-09-12 | 中国航发哈尔滨轴承有限公司 | Method for machining outer ring of large knuckle bearing |
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| CN102642164A (en) * | 2012-04-27 | 2012-08-22 | 江苏万达特种轴承有限公司 | Method for forming and grinding cylindrical roll bearing inner ring with single retaining side or with single retaining side and step |
| CN102672431B (en) * | 2012-05-18 | 2014-08-20 | 浙江博盟精工机械有限公司 | Production process of shaft coupler bearing |
| CN103737265B (en) * | 2013-12-27 | 2015-11-18 | 滨州盟威斯林格缸套有限公司 | The processing technology of piston abrasion-proof inserted ring |
| CN105196121A (en) * | 2015-10-27 | 2015-12-30 | 衡阳纺织机械有限公司 | Method for machining end faces of connecting shaft bearing outer ring |
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