CN204200845U - A kind of spherical bilayer steel ball modified node method - Google Patents
A kind of spherical bilayer steel ball modified node method Download PDFInfo
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- CN204200845U CN204200845U CN201420627287.6U CN201420627287U CN204200845U CN 204200845 U CN204200845 U CN 204200845U CN 201420627287 U CN201420627287 U CN 201420627287U CN 204200845 U CN204200845 U CN 204200845U
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Abstract
The utility model relates to a kind of spherical bilayer steel ball modified node method, includes normal carbon steel ball core, and the ferro-alloy be coated on outside described carbon element steel ball core is outer; Described carbon element steel ball core outer surface is provided with boride layer; The outer surface of described carbon element steel ball core is evenly distributed with multiple pit; The bottom surface of described pit is hemisphere face structure; The outer surface relative with described carbon element steel ball core of described ferro-alloy is provided with the protruding structure closed with described pit shape and cooperating number.By being provided with bowl configurations at the outer surface of carbon element steel ball core, ferro-alloy skin has part and enters in pit and form protruding structure, can increase so two-layer between conjugation grade.
Description
Technical field
The utility model belongs to bearing steel pearl field, particularly a kind of spherical bilayer steel ball modified node method.
Background technique
Steel ball is the important component part of rolling bearing, and the steel ball used in existing bearing includes two kinds, and one is rod formula steel ball, and one is spheroidal steel ball.Wherein, rod formula steel ball is mainly used in the large field of bearings of load-bearing, and spheroidal steel ball is generally applied to the lighter field of load-bearing.
And in the field that load-bearing is lighter, generally all require that bearing has higher precision, and such precision mainly relies on the precision of the circularity of steel ball and steel ball to realize.In order to realize the circularity of steel ball, requiring that the material manufacturing steel ball has certain plasticity, but but result in the decline of hardness.When this kind of steel ball being used for the large or high-revolving equipment of pressure, easily cause steel ball to occur scar or compressive deformation because of the impact of other parts, the working life of reducing steel ball also can exert an adverse impact to other adjacent parts simultaneously.
For this reason, existing technology proposes the technological scheme of the outer surface plating layer of ceramic film at steel ball, to increase intensity and the abrasion resistance of ball surfaces.But present ceramic coating steel ball does not really realize the performance of ceramic coating, the defect that ceramic coating has easily occurs plated film obscission when bearing high pressure, and the finite thickness of ceramic coating, is difficult to the high strength requirement really realizing steel ball.
In order to overcome the defect of ceramic membrane, the technological scheme that existing technology proposes also to be actually used in production adopts two-layer material to realize, namely the steel core being easy to process is adopted at the internal layer of steel ball, at skin, the large ferro-alloy of one deck hardness is set, because two kinds of materials all belong to ferro-alloy, there will be the permeation of atom on the surface connected, improve the zygosity between two kinds of materials, improve the working life of spherical steel ball.
But in the use of reality, the life-span of bearing and spoilage comparatively ceramic membrane technology are greatly improved, but still Shortcomings part, namely when there is bearing damage, find be still steel ball two-layer between in conjunction with imprecision, and the skin of steel ball is damaged because brittleness is high.
Model utility content
The purpose of this utility model is by proposing improvement opportunity scheme to the double-deck spherical steel ball of existing use, by the technical program, improve the conjugation grade between steel ball double layer construction, improve the working life of spherical steel ball.
The utility model is achieved through the following technical solutions:
A kind of spherical bilayer steel ball modified node method, includes normal carbon steel ball core, and the ferro-alloy be coated on outside described carbon element steel ball core is outer; Described carbon element steel ball core outer surface is provided with boride layer;
The outer surface of described carbon element steel ball core is evenly distributed with multiple pit; The bottom surface of described pit is hemisphere face structure;
The outer surface relative with described carbon element steel ball core of described ferro-alloy is provided with the protruding structure closed with described pit shape and cooperating number.
The thickness of described boride layer is greater than the outer field thickness of described ferro-alloy.
The shape that the sidewall of described pit surrounds is cylinder or circular cone structure.
Described circular cone, the upper bottom surface radius being positioned at carbon element steel ball core outer surface is greater than the bottom surface radius being positioned at pit bottom.
The radius of described hemisphere face structure is identical with the radius of described pit underpart.
The degree of depth of described pit is the 1/10-1/30 of the radius of described carbon element steel ball core.
The outer field thickness of described ferro-alloy is greater than the degree of depth of described pit.
The beneficial effects of the utility model are:
1, by technical scheme, by being provided with bowl configurations at the outer surface of carbon element steel ball core, ferro-alloy skin has part and enters in pit and form protruding structure, can increase so two-layer between conjugation grade.
2, by the hemisphere face vibrational power flow to pit bottom surface, when making external pressure or shaking force pass to protruding structure by skin, large stress concentration phenomenon can not be produced, therefore, the structure of carbon element steel ball core inner can not be destroyed, improve the load bearing stength of steel ball.
3, by the boride layer structure at carbon element steel ball core outer surface, the hardness of steel ball and carbon element steel ball core are reduced to the outer field difference of hardness of ferro-alloy, the bulk strength of steel ball can be improved like this.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section of the utility model double-deck steel ball embodiment.
Embodiment
Describe the technical solution of the utility model in detail by the following examples, following embodiment is only exemplary, only can be used for explaining and the technical solution of the utility model being described, and can not be interpreted as being the restriction to technical solutions of the utility model.
Embodiment 1
The spherical steel ball of the application is mainly applied on the bearing of precision type instrument, and the utility model provides a kind of spherical bilayer steel ball modified node method, includes normal carbon steel ball core, and the ferro-alloy be coated on outside described carbon element steel ball core is outer; Normal carbon steel core in this application refers to and does not include special element, the carbon steel of the elements such as such as tungsten, vanadium, titanium, zirconium, manganese, yttrium, rare earth, and its model meets the regulation of country, and concrete use is determined according to the needs produced.The outer field ferro-alloy of ferro-alloy herein can use special steel as required; also carbon steel can be used at some needs; but need to heat-treat carbon steel; because the process of thermal treatment scope that not to be the utility model claimed; therefore be not described in detail, but at least will include the operation such as tempering, quenching.
Described carbon element steel ball core outer surface is provided with boride layer, and the thickness of boride layer is greater than the outer field thickness of described ferro-alloy; The boride layer of the application is in carbon element steel ball core drawing process, uses boriding medium to carry out Bononizing pretreatment.
The outer surface of described carbon element steel ball core is evenly distributed with multiple pit, and this structure was carried out before boronising operation, can ensure so to be also provided with boride layer on the surface of pit; The outer surface relative with described carbon element steel ball core of described ferro-alloy is provided with the protruding structure closed with described pit shape and cooperating number.
The shape that the sidewall of described pit surrounds is cylinder, and the bottom surface of described pit is hemisphere face structure; The radius of described hemisphere face structure is identical with the radius of described pit underpart.For the hemisphere face structure of pit, namely the shape of protruding structure is identical with the shape of pit, such structure, namely the conjugation grade of ferro-alloy skin and carbon element steel ball core can be ensured, simultaneously, when external force passes to ferro-alloy skin, this power passes to the protruding structure of internal surface, according to active force and the reaction force relation of power, power suffered by pit is stressed identical with protruding structure, now, if the bottom surface of pit is plane structure, angle between itself and pit sidewall is stress concentration point, easy appearance damages, equally, the bottom surface of protruding structure and the angle of side are also stress concentration points, if there is situation about damaging, usually occur in herein.And the application is by being set to hemisphere face structure in the bottom surface of pit, angle is increased and dispersion, making stress dispersion, improving bearing power.
The degree of depth of described pit is the 1/10-1/30 of described carbon element steel ball core radius.
The outer field thickness of described ferro-alloy is greater than the degree of depth of described pit.
Embodiment 2
As shown in Figure 1, the utility model provides a kind of spherical bilayer steel ball modified node method, includes normal carbon steel ball core 1, and is coated on the ferro-alloy skin 2 outside described carbon element steel ball core 1.
Described carbon element steel ball core 1 outer surface is provided with boride layer 3, and the thickness of boride layer 3 is greater than the thickness of described ferro-alloy skin 2; The boride layer of the application is in carbon element steel ball core drawing process, uses boriding medium to carry out Bononizing pretreatment.
The outer surface of described carbon element steel ball core 1 is evenly distributed with multiple pit 11, and this structure was carried out before boronising operation, can ensure so to be also provided with boride layer on the surface of pit; The surface that described ferro-alloy skin 2 is relative with described carbon element steel ball core 1 is provided with the protruding structure 21 closed with described pit 11 shape and cooperating number.
The shape surrounded described in the sidewall of described pit 11 is circular cone structure, and the upper bottom surface radius being positioned at carbon element steel ball core outer surface is greater than the bottom surface radius being positioned at pit bottom.The bottom surface of described pit is hemisphere face structure; The radius of described hemisphere face structure is identical with the radius of described pit underpart.For the hemisphere face structure of pit, namely the shape of protruding structure is identical with the shape of pit, such structure, namely the conjugation grade of ferro-alloy skin and carbon element steel ball core can be ensured, simultaneously, when external force passes to ferro-alloy skin, this power passes to the protruding structure of internal surface, according to active force and the reaction force relation of power, power suffered by pit is stressed identical with protruding structure, now, if the bottom surface of pit is plane structure, angle between itself and pit sidewall is stress concentration point, easy appearance damages, equally, the bottom surface of protruding structure and the angle of side are also stress concentration points, if there is situation about damaging, usually occur in herein.And the application is by being set to hemisphere face structure in the bottom surface of pit, angle is increased and dispersion, making stress dispersion, improving bearing power.
The degree of depth of described pit is the 1/10-1/30 of described carbon element steel ball core radius.
The outer field thickness of described ferro-alloy is greater than the degree of depth of described pit.
Although illustrate and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and spirit, these equivalent form of values fall into the application's appended claims limited range equally.Scope of the present utility model is by claims and equivalency thereof.
Claims (7)
1. a spherical bilayer steel ball modified node method, includes normal carbon steel ball core, and the ferro-alloy be coated on outside described carbon element steel ball core is outer; It is characterized in that: described carbon element steel ball core outer surface is provided with boride layer;
The outer surface of described carbon element steel ball core is evenly distributed with multiple pit; The bottom surface of described pit is hemisphere face structure;
The outer surface relative with described carbon element steel ball core of described ferro-alloy is provided with the protruding structure closed with described pit shape and cooperating number.
2. spherical bilayer steel ball modified node method according to claim 1, is characterized in that: the thickness of described boride layer is greater than the outer field thickness of described ferro-alloy.
3. spherical bilayer steel ball modified node method according to claim 1, is characterized in that: the shape that the sidewall of described pit surrounds is cylinder or circular cone structure.
4. spherical bilayer steel ball modified node method according to claim 3, is characterized in that: described circular cone, and the upper bottom surface radius being positioned at carbon element steel ball core outer surface is greater than the bottom surface radius being positioned at pit bottom.
5. spherical bilayer steel ball modified node method according to claim 1, is characterized in that: the radius of described hemisphere face structure is identical with the radius of described pit underpart.
6. spherical bilayer steel ball modified node method according to claim 1, is characterized in that: the degree of depth of described pit is the 1/10-1/30 of the radius of described carbon element steel ball core.
7. spherical bilayer steel ball modified node method according to claim 1, is characterized in that: the outer field thickness of described ferro-alloy is greater than the degree of depth of described pit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420627287.6U CN204200845U (en) | 2014-10-27 | 2014-10-27 | A kind of spherical bilayer steel ball modified node method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420627287.6U CN204200845U (en) | 2014-10-27 | 2014-10-27 | A kind of spherical bilayer steel ball modified node method |
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| CN204200845U true CN204200845U (en) | 2015-03-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109677092A (en) * | 2019-02-11 | 2019-04-26 | 力星金燕钢球(宁波)有限公司 | A kind of double-layer ceramic shape steel ball and preparation method thereof |
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- 2014-10-27 CN CN201420627287.6U patent/CN204200845U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109677092A (en) * | 2019-02-11 | 2019-04-26 | 力星金燕钢球(宁波)有限公司 | A kind of double-layer ceramic shape steel ball and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Shi Xianggui Inventor before: Hu Guoliang |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 315000 Wang Dong village, Shang Tian Town, Fenghua District, Zhejiang, Ningbo Patentee after: Power star swallow steel ball (Ningbo) Co., Ltd. Address before: 315000, No. 16, main road, Wang Dong village, Tian Tian Town, Ningbo, Zhejiang, Fenghua Patentee before: Fenghua City Golden Swallow Steel Ball Co., Ltd. |