CN104372161A - Slewing bearing processing and surface hardness treatment technique - Google Patents
Slewing bearing processing and surface hardness treatment technique Download PDFInfo
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- CN104372161A CN104372161A CN201410594083.1A CN201410594083A CN104372161A CN 104372161 A CN104372161 A CN 104372161A CN 201410594083 A CN201410594083 A CN 201410594083A CN 104372161 A CN104372161 A CN 104372161A
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Abstract
The invention discloses a slewing bearing processing and surface hardness treatment technique which comprises the following steps: feeding, rough machining, finish machining and QPQ salt bath composite treatment. The technique simplifies the technical procedure, lowers abundant cost, enhances the yield, is substituted for the traditional multiprocessing procedure, lowers the time cost and is easy for popularization and application; and the slewing bearing obtained by the technique has the advantages of small amount of deformation, wear resistance, corrosion resistance and fatigue resistance.
Description
Technical field
The present invention relates to rotating bearing processing and manufacturing field, particularly relate to the processing of a kind of rotating bearing and surface hardness treatment process.
Background technology
Rotating bearing industry experienced by the development in more than 30 years in China, JB2300-84 " rotating bearing form, basic parameter and the technical requirements " standard issued first from 1984, and in JB/T2300-1999 " rotating bearing " standard that 1999 revise, existing China has possessed perfect rotating bearing design, the comprehensive exploitation ability of Computer-Assisted Design, Manufacture And Test.Different industries proposes the standard of oneself to rotating bearing page simultaneously, and as wind-power electricity generation, building machinery, bearing industry etc., product progresses into refinement, competition situation wide in variety as can be seen here.
At present, what on market, consumption was maximum is the supporting of single four-point contact ball slewing, and the overwhelming majority that account for wherein of raceway diameter between Φ 500 ~ Φ 1500mm; Nowadays, along with the development, particularly wind power industry fast growth of engineering machinery, special purpose vehicle and industrial robot etc., the quality of product, novelty are had higher requirement.But high precision, the high-end rotating bearing market that the life-span is long, weathering resistance is strong are still held by traditional enterprise, domesticly every year all need import this type of rotating bearing a large amount of abroad, domestic enterprise all faces the severe challenge of technological innovation.
Traditional rotating bearing treatment process is: material loading-roughing-raceway quenching-teeth portion quenching-precision work, its complex disposal process cost is high, precision work can machine away the processed good surface of a part, produces waste, weakens the properties of part, need to quench respectively to teeth portion and raceway in heat treatment process, and treatment effect is undesirable, hardness is low, and corrosion resistance is poor, and deflection is large, scrap rate is high.
Summary of the invention
The present invention is out of shape the high problem of large cost to solve above-mentioned prior heat treatment process, and provide a kind of rotating bearing to process and surface hardness treatment process, processing step is as follows:
(1) material loading: raw material is cut into blank;
(2) roughing: remove on blank and cast, the irregular epidermis of forging, is simply worked into process redundancy at 3 ~ 8 millimeters according to part requirements;
(3) precision work: roughing part is carried out precision work;
(4) QPQ Quench-Polish-Quench technology: metallic substance reacts with salt bath liquid under the working temperature of 570 ± 10 DEG C, can form the compound layer of the colory densification of one deck in metallic surface.
As preferably, before described QPQ Quench-Polish-Quench technology, complicated shape need to carry out tempering at temperature more than 580 DEG C, and workpiece will at 350 ~ 400 DEG C of insulation 15 ~ 20min, and the modifier treatment of Slow cooling subsequently.
As preferably, be slightly swelling after compensation solution art breading, before part process, leave the process redundancy of 10 ± 2 microns in diametric(al).
The invention has the beneficial effects as follows: this invention simplifies processing sequence,---thick precision work---the QPQ Quench-Polish-Quench technology that only needs material loading, just directly can go out finished product, simplify operation, reduce a large amount of costs, and it is little to have deflection, wear resistance, erosion resistance, resistance to fatigue, improve yield rate, instead of traditional multiple tracks treatment process, reduce time cost, be easy to promote the use of.
Accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is process flow sheet of the present invention;
Embodiment
All features disclosed in this specification sheets, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this specification sheets, unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
A kind of rotating bearing processing as shown in Figure 1 and surface hardness treatment process, processing step is as follows:
(1) material loading: raw material is cut into blank;
(2) roughing: remove on blank and cast, the irregular epidermis of forging, is simply worked into process redundancy at 3 ~ 8 millimeters according to part requirements;
(3) precision work: roughing part is carried out precision work;
(4) QPQ Quench-Polish-Quench technology: metallic substance reacts with salt bath liquid under the working temperature of 570 ± 10 DEG C, can form the compound layer of the colory densification of one deck in metallic surface.
Before described QPQ Quench-Polish-Quench technology, complicated shape need to carry out tempering at temperature more than 580 DEG C, and workpiece will at 350 ~ 400 DEG C of insulation 15 ~ 20min, and the modifier treatment of Slow cooling subsequently.
For slightly swelling after compensation solution art breading, before part process, leave the process redundancy of 10 ± 2 microns in diametric(al).
In treating processes, concrete process is as follows: material loading, and---------precision work---QPQ Quench-Polish-Quench technology---inspection is dispatched from the factory in roughing in component test.
QPQ Quench-Polish-Quench technology: comprise cleaning--heating--nitriding--cooling and oxidation, clean with raw spirit during cleaning, respectively salt bath liquid is heated to 570 ± 10 DEG C and heat parts to 400 DEG C, part is put into salt bath liquid and soak, finally put into and carry out cooling and being oxidized.
This invention simplifies processing sequence,---thick precision work---the QPQ Quench-Polish-Quench technology that only needs material loading, just directly can go out finished product, simplify operation, reduce a large amount of costs, and it is little to have deflection, wear resistance, erosion resistance, resistance to fatigue, improve yield rate, instead of traditional multiple tracks treatment process, reduce time cost, be easy to promote the use of.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (3)
1. rotating bearing processing and a surface hardness treatment process, it is characterized in that, processing step is as follows:
(1) material loading: raw material is cut into blank;
(2) roughing: remove on blank and cast, the irregular epidermis of forging, is simply worked into process redundancy at 3 ~ 8 millimeters according to part requirements;
(3) precision work: roughing part is carried out precision work;
(4) QPQ Quench-Polish-Quench technology: metallic substance reacts with salt bath liquid under the working temperature of 570 ± 10 DEG C, can form the compound layer of the colory densification of one deck in metallic surface.
2. a kind of rotating bearing processing according to claim 1 and surface hardness treatment process, it is characterized in that, before described QPQ Quench-Polish-Quench technology, complicated shape need to carry out tempering at temperature more than 580 DEG C, workpiece will at 350 ~ 400 DEG C of insulation 15 ~ 20min, and the modifier treatment of Slow cooling subsequently.
3. a kind of rotating bearing processing according to claim 1 and surface hardness treatment process, is characterized in that, is slightly swelling after compensation solution art breading, leaves the process redundancy of 10 ± 2 microns before part process in diametric(al).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410594083.1A CN104372161A (en) | 2014-10-29 | 2014-10-29 | Slewing bearing processing and surface hardness treatment technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410594083.1A CN104372161A (en) | 2014-10-29 | 2014-10-29 | Slewing bearing processing and surface hardness treatment technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104372161A true CN104372161A (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410594083.1A Pending CN104372161A (en) | 2014-10-29 | 2014-10-29 | Slewing bearing processing and surface hardness treatment technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953766A (en) * | 2021-10-29 | 2022-01-21 | 安徽军明机械制造有限公司 | Production process method of pivoting support shell of grapple |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002060847A (en) * | 2000-08-22 | 2002-02-28 | Ntn Corp | Heat resistant carburized rolling bearing parts and method for producing the same |
| US6770152B1 (en) * | 1999-09-03 | 2004-08-03 | Nsk Ltd. | Rolling bearing |
| CN101109038A (en) * | 2007-08-20 | 2008-01-23 | 常州市武进第二法兰锻造有限公司 | Thermal treatment technique for improving rigidity of integer manhole flange sealing surface |
| CN103205668A (en) * | 2013-04-28 | 2013-07-17 | 莱州天润机械有限公司 | Application of QPQ (Quench-Polish-Quench) salt bath composite treatment process in handle rods at two ends of die stock and cutter bar frame |
-
2014
- 2014-10-29 CN CN201410594083.1A patent/CN104372161A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6770152B1 (en) * | 1999-09-03 | 2004-08-03 | Nsk Ltd. | Rolling bearing |
| JP2002060847A (en) * | 2000-08-22 | 2002-02-28 | Ntn Corp | Heat resistant carburized rolling bearing parts and method for producing the same |
| CN101109038A (en) * | 2007-08-20 | 2008-01-23 | 常州市武进第二法兰锻造有限公司 | Thermal treatment technique for improving rigidity of integer manhole flange sealing surface |
| CN103205668A (en) * | 2013-04-28 | 2013-07-17 | 莱州天润机械有限公司 | Application of QPQ (Quench-Polish-Quench) salt bath composite treatment process in handle rods at two ends of die stock and cutter bar frame |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953766A (en) * | 2021-10-29 | 2022-01-21 | 安徽军明机械制造有限公司 | Production process method of pivoting support shell of grapple |
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Application publication date: 20150225 |