CN113751712A - Powder metallurgy brass bearing retainer and preparation process thereof - Google Patents
Powder metallurgy brass bearing retainer and preparation process thereof Download PDFInfo
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- CN113751712A CN113751712A CN202110952009.2A CN202110952009A CN113751712A CN 113751712 A CN113751712 A CN 113751712A CN 202110952009 A CN202110952009 A CN 202110952009A CN 113751712 A CN113751712 A CN 113751712A
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- bearing retainer
- powder metallurgy
- brass bearing
- carbon
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- 229910001369 Brass Inorganic materials 0.000 title claims abstract description 32
- 239000010951 brass Substances 0.000 title claims abstract description 32
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 23
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 239000000314 lubricant Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 20
- 238000000227 grinding Methods 0.000 claims description 13
- 238000005245 sintering Methods 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 9
- 238000004806 packaging method and process Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000011812 mixed powder Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010923 batch production Methods 0.000 claims description 3
- 238000001354 calcination Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 6
- 239000010949 copper Substances 0.000 abstract description 6
- 229910052759 nickel Inorganic materials 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract description 3
- 238000009740 moulding (composite fabrication) Methods 0.000 description 10
- 239000000843 powder Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- 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
- F16C33/38—Ball cages
- F16C33/44—Selection of substances
-
- 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
- F16C33/46—Cages for rollers or needles
- F16C33/56—Selection of substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
-
- 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
- F16C2202/00—Solid materials defined by their properties
- F16C2202/50—Lubricating properties
-
- 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
- F16C2202/00—Solid materials defined by their properties
- F16C2202/50—Lubricating properties
- F16C2202/52—Graphite
-
- 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
- F16C2204/00—Metallic materials; Alloys
- F16C2204/60—Ferrous alloys, e.g. steel alloys
- F16C2204/66—High carbon steel, i.e. carbon content above 0.8 wt%, e.g. through-hardenable steel
Abstract
The invention belongs to the technical field of bearing zero processing, and particularly relates to a powder metallurgy brass bearing retainer and a preparation process thereof, wherein the powder metallurgy brass bearing retainer is prepared from the following raw materials in percentage by weight: 70-73% of iron powder, 0.7-1.0% of carbon, 20-25% of copper powder, 2.5-3% of nickel powder and 0.6-0.8% of lubricant; the powder metallurgy brass bearing retainer is made of iron, copper, nickel and carbon, and has the characteristics of tight pore space, high oil content, large bearing capacity, low noise and the like due to the addition of the copper, the nickel and the carbon.
Description
Technical Field
The invention belongs to the technical field of bearing zero processing, and particularly relates to a powder metallurgy brass bearing retainer and a preparation process thereof.
Background
The parts of the bearing are generally made by forging or lathing, but because the parts are made of high-carbon chromium steel as a raw material, the oil content is small in the using process due to the fact that the material is compact, the surface lubricant has poor wettability, and the abrasion is serious, the reduced iron powder is gray or black powder mainly containing simple substance iron, also called as a double absorbent, generally generated by reducing ferroferric oxide in hydrogen flow or carbon monoxide flow under the high-temperature condition, and the parts of the bearing are usually made by mixing the reduced iron powder with other metal powder and adopting a pressing, sintering and forming process.
To this end, a powder metallurgy brass bearing retainer and a process for manufacturing the same are designed to solve the above problems.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a powder metallurgy brass bearing retainer and a preparation process thereof, which can improve the production efficiency and have the characteristics of high oil content, large bearing capacity and low noise.
In order to achieve the purpose, the invention provides the following technical scheme: a powder metallurgy brass bearing retainer made from raw materials in the following proportions:
70-73% of iron powder, 0.7-1.0% of carbon, 20-25% of copper powder, 2.5-3% of nickel powder and 0.6-0.8% of lubricant.
As a preferred powder metallurgy brass bearing retainer of the present invention, the particle size range of the iron powder: 50-100 um;
particle size range of copper powder: 10-60 um;
the particle size range of the carbon powder is as follows: 0.5-10 um.
Preferably, as a powder metallurgy brass bearing retainer of the present invention, the carbon powder has a carbon content of at least 99% by mass.
Preferably, the lubricant is one of graphite powder, sulfur powder and hard ester.
According to another aspect of the present invention there is also provided a process for the preparation of a powder metallurgy brass bearing retainer, the process comprising the steps of:
s1: mixing materials, namely putting the pre-prepared water atomized iron powder, copper powder, carbon powder, zinc powder, nickel powder, forming agent and lubricant into a mixer for stirring at one time according to the mixture ratio of the raw materials.
S2: profiling, namely filling the uniformly mixed powder into a hopper of a machine, and starting to press and form in a forming die;
s3: sintering, namely, neatly placing the molded blank in a calcining furnace for sintering;
s4: deburring, namely grinding and deburring the sintered product by using a vibration grinding machine, and adding anti-rust oil during grinding for at least 15 min;
s5: and packaging, namely packaging by using a No. 5 valve bag small bag.
As a preferable preparation process of the powder metallurgy brass bearing retainer, in S1, the mesh number of the iron powder is not less than 100 meshes, and the stirring time is at least 45 min.
Preferably, in the preparation process of the powder metallurgy brass bearing retainer of the present invention, when the uniformly mixed powder is loaded into the hopper of the machine and is press-molded in the molding die in S2, the method specifically includes the following steps:
the first piece detection is needed before pressing begins, the appearance and the size of the product are detected according to the requirements of a drawing, and batch production can be realized after the product is qualified;
and (4) performing sampling inspection on the product every 30min in the mass production process of the product, and timely correcting the found unqualified product.
As an optimization of the preparation process of the powder metallurgy brass bearing retainer, the six temperature zones of S3 are 550 ℃, 680 ℃, 850 ℃, 1120 ℃ and 1120 ℃ respectively when sintering is carried out.
Preferably, the forming die in S2 comprises a female die, an upper punch and a lower punch, wherein the upper punch is arranged right above the female die, and the lower punch is arranged at the bottom of the female die in a penetrating manner.
The powder metallurgy brass bearing retainer and the preparation process thereof are preferred;
compared with the prior art, the invention has the beneficial effects that:
1. the powder metallurgy brass bearing retainer is made of iron, copper, nickel and carbon, and has the characteristics of tight pore space, high oil content, large bearing capacity, low noise and the like because of the addition of the copper, the nickel and the carbon.
2. The processing efficiency of the brass bearing retainer can be effectively improved by adopting a brand-new processing technology, the burr on the surface of the part can be effectively removed by adopting the vibration grinding machine to grind and remove the burr, the internal stress of the part can be eliminated in the vibration collision process, and meanwhile, the rust-proof oil is added in the vibration grinding process, so that the rust-proof technology of the part is simplified, and the subsequent packaging is facilitated.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a forming die of the present invention;
FIG. 2 is one of the schematic structural views of a pressed blank of the present invention;
FIG. 3 is a second schematic view of the construction of a pressed blank of the present invention;
FIG. 4 is a schematic diagram of the structure of an undershoot in the present invention;
in the figure: 1. a female die; 2. punching; 3. undershoot.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1;
a powder metallurgy brass bearing retainer made from raw materials in the following proportions:
70-73% of iron powder, 0.7-1.0% of carbon, 20-25% of copper powder, 2.5-3% of nickel powder and 0.6-0.8% of lubricant.
In an alternative embodiment: the particle size range of the iron powder is as follows: 50-100 um;
particle size range of copper powder: 10-60 um;
the particle size range of the carbon powder is as follows: 0.5-10 um.
The steel is made of iron, copper, nickel and carbon, and the copper, the nickel and the carbon are added, so the steel has the characteristics of tight pores, high oil content, large bearing capacity and low noise.
In an alternative embodiment: the carbon content of the carbon powder is at least 99 percent by mass.
In an alternative embodiment: the lubricant is one of graphite powder, sulfur powder and hard ester, and is used to reduce the friction between powder grains and the mold wall and between powder grains and the mold punch during pressing, improve the density distribution of pressed compact, reduce the wear of the mold and facilitate demolding.
As shown in fig. 1-4;
according to another aspect of the present invention there is also provided a process for the preparation of a powder metallurgy brass bearing retainer, the process comprising the steps of:
step S1: mixing materials, namely putting the pre-prepared water atomized iron powder, copper powder, carbon powder, zinc powder, nickel powder, forming agent and lubricant into a mixer for stirring at one time according to the mixture ratio of the raw materials.
Step S2: profiling, namely filling the uniformly mixed powder into a hopper of a machine, and starting to press and form in a forming die;
specifically;
when the uniformly mixed powder is loaded into the hopper of the machine and is pressed and formed in a forming die, the method specifically comprises the following steps:
the first piece detection is needed before pressing begins, the appearance and the size of the product are detected according to the requirements of a drawing, and batch production can be realized after the product is qualified;
performing sampling inspection on the product every 30min in the mass production process of the product, and timely correcting the found unqualified product;
step S3: sintering, namely, neatly placing the molded blank in a calcining furnace for sintering;
step S4: deburring, namely grinding and deburring the sintered product by using a vibration grinding machine, and adding anti-rust oil during grinding for at least 15 min;
step S5: and packaging, namely packaging by using a No. 5 valve bag small bag.
By adopting the processing technology, the processing efficiency of the brass bearing retainer can be effectively improved, and meanwhile, the vibration grinding machine is adopted to grind and deburr, so that on one hand, burrs on the surface of a part can be effectively removed, and meanwhile, the internal stress of the part can be eliminated in the vibration collision process, and meanwhile, the rust-proof oil is added in the vibration grinding process, so that the rust-proof technology of the part is simplified, and the subsequent packaging is facilitated.
In an alternative embodiment: in S1, the mesh number of the iron powder is not less than 100 meshes, and the stirring time is at least 45min, so that the raw materials can be fully stirred in a mixer, and the mixing is more uniform.
In an alternative embodiment: in S3, the temperatures of the six temperature zones during sintering are 550 ℃, 680 ℃, 850 ℃, 1120 ℃ and 1120 ℃, respectively, and the temperatures of the temperature zones are set so that the structure of the blank can be further strengthened during sintering.
In an alternative embodiment: the forming die in S2 includes a die 1, an upper punch 2, and a lower punch 3, the upper punch 2 is provided directly above the die 1, and the lower punch 3 is provided through the bottom of the die 1.
In this embodiment: when the pressing forming is carried out, the die is matched with the press machine, so that the manufacturing efficiency of the blank and the structural strength of the blank can be improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A powder metallurgy brass bearing retainer and a preparation process thereof are characterized in that the powder metallurgy brass bearing retainer is prepared by the following raw materials by weight:
70-73% of iron powder, 0.7-1.0% of carbon, 20-25% of copper powder, 2.5-3% of nickel powder and 0.6-0.8% of lubricant.
2. A powder metallurgy brass bearing retainer according to claim 1, wherein: the particle size range of the iron powder is as follows: 50-100 um; the particle size range of the copper powder is as follows: 10-60 um; the particle size range of the carbon powder is as follows: 0.5-10 um.
3. A powder metallurgy brass bearing retainer according to claim 2, wherein: the carbon content of the carbon powder is at least 99 percent by mass.
4. A powder metallurgy brass bearing retainer according to claim 3, wherein: the lubricant is one of graphite powder, sulfur powder and hard ester.
5. A process for the preparation of a powder metallurgy brass bearing retainer for use in the preparation of a powder metallurgy brass bearing retainer of claim 4, the process comprising the steps of: s1: mixing materials, namely putting the pre-prepared water atomized iron powder, copper powder, carbon powder, zinc powder, nickel powder, forming agent and lubricant into a mixer for stirring at one time according to the mixture ratio of the raw materials, and S2: profiling, namely filling the uniformly mixed powder into a hopper of a machine, and starting to press and form in a forming die; s3: sintering, namely, neatly placing the molded blank in a calcining furnace for sintering; s4: deburring, namely grinding and deburring the sintered product by using a vibration grinding machine, and adding anti-rust oil during grinding for at least 15 min; s5: and packaging, namely packaging by using a No. 5 valve bag small bag.
6. The process of making a powder metallurgy brass bearing retainer according to claim 5, wherein: in the S1, the mesh number of the iron powder is not less than 100 meshes, and the stirring time is at least 45 min.
7. The process of making a powder metallurgy brass bearing retainer according to claim 5, wherein: in S2, when the uniformly mixed powder is loaded into the hopper of the machine and is pressed and molded in the molding die, the method specifically includes the following steps:
the first piece detection is needed before pressing begins, the appearance and the size of the product are detected according to the requirements of a drawing, and batch production can be realized after the product is qualified; and (4) performing sampling inspection on the product every 30min in the mass production process of the product, and timely correcting the found unqualified product.
8. The process of making a powder metallurgy brass bearing retainer according to claim 5, wherein: the six temperature zones in the S3 are respectively 550 ℃, 680 ℃, 850 ℃, 1120 ℃ and 1120 ℃ when sintering is carried out.
9. The process of making a powder metallurgy brass bearing retainer according to claim 5, wherein: the forming die in the S2 comprises a female die (1), an upper punch (2) and a lower punch (3), wherein the upper punch (2) is arranged right above the female die (1), and the lower punch (3) penetrates through the bottom of the female die (1).
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| CN202110952009.2A CN113751712A (en) | 2021-08-19 | 2021-08-19 | Powder metallurgy brass bearing retainer and preparation process thereof |
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| CN202110952009.2A CN113751712A (en) | 2021-08-19 | 2021-08-19 | Powder metallurgy brass bearing retainer and preparation process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115213397A (en) * | 2022-07-05 | 2022-10-21 | 广东华于科技股份有限公司 | Powder metallurgy bearing support and preparation process thereof |
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