CN113245794A - Gapless elastic bearing bush of rolling die and machining method thereof - Google Patents
Gapless elastic bearing bush of rolling die and machining method thereof Download PDFInfo
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- CN113245794A CN113245794A CN202110596349.6A CN202110596349A CN113245794A CN 113245794 A CN113245794 A CN 113245794A CN 202110596349 A CN202110596349 A CN 202110596349A CN 113245794 A CN113245794 A CN 113245794A
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- 238000003754 machining Methods 0.000 title claims abstract description 73
- 238000005096 rolling process Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000000839 emulsion Substances 0.000 claims abstract description 56
- 238000010791 quenching Methods 0.000 claims abstract description 36
- 230000000171 quenching effect Effects 0.000 claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 238000003672 processing method Methods 0.000 claims abstract description 14
- 238000005520 cutting process Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000005496 tempering Methods 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims description 31
- 238000010438 heat treatment Methods 0.000 claims description 27
- 238000007599 discharging Methods 0.000 claims description 9
- 229910052748 manganese Inorganic materials 0.000 claims description 8
- 239000011572 manganese Substances 0.000 claims description 8
- 238000007747 plating Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000003746 surface roughness Effects 0.000 abstract description 3
- 238000005240 physical vapour deposition Methods 0.000 description 17
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
- Forging (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention provides a gapless elastic bearing bush of a rolling die and a processing method thereof, wherein the processing method comprises the following steps: s1, machining the metal blank according to the preset size; s2, quenching the emulsion; s3, tempering to eliminate the internal pressure; and S4, performing linear cutting machining on the expansion groove, and dividing the workpiece into two parts. According to the processing method of the gapless elastic bearing bush of the rolling die, provided by the invention, the technological parameters of emulsion quenching and tempering treatment are further optimized, so that the deformation of the processed workpiece is small, the size precision, the surface roughness, the hardness and the like of the workpiece all reach international advanced levels, and the requirements of practical application can be met; the processing method has the advantages of simple steps, controllable process, easy large-scale production, easily obtained and cheap raw materials, low energy consumption in the production process, excellent comprehensive performance of the manufactured roll-forming die gapless elastic bearing bush and good practical application prospect.
Description
Technical Field
The invention belongs to the technical field of machining of fittings of rim roll forming machines, and particularly relates to a gapless elastic bearing bush of a roll forming die and a machining method thereof.
Background
The gapless elastic bearing bush is an important keyless connecting device in modern industrial and mechanical equipment, is generally applied between a main shaft and a rolling mould of a more advanced steel wheel rolling machine, and realizes the keyless connection of the rolling mould and a shaft by generating huge holding force between an inner ring and the shaft of the gapless elastic bearing bush and between an outer ring and the rolling mould.
Because the prior domestic conventional processing method is difficult to ensure the precision of the elastic bearing bush, the elastic bearing bush is easy to deform during heat treatment, the joint rate between the bearing bush and a shaft is low, and the shaft and the bearing bush are easy to wear. The gapless elastic bearing bush of the roll forming machine used in China at present always depends on import, the cost is high, and the purchase period is long.
In conclusion, the research and development of a machining method of a gapless elastic bearing bush of a rolling die with small deformation and high workpiece dimensional accuracy is a key technical problem to be solved in the field.
Disclosure of Invention
The invention aims to provide a gapless elastic bearing bush of a rolling die and a processing method thereof.
The invention adopts the following technical scheme:
a processing method of a gapless elastic bearing bush of a rolling die comprises the following steps:
s1, machining the metal blank according to the preset size;
s2, quenching the emulsion;
s3, tempering to eliminate the internal pressure;
and S4, performing linear cutting machining on the expansion groove, and dividing the workpiece into two parts.
In the above technical scheme, in the step S2, the emulsion quenching is to heat the machined elastic bearing blank at 820-.
Further, in the above technical solution, in step S2, the temperature of the emulsion is controlled to be 5 to 12 ℃ during the quenching of the emulsion.
Further, in the above technical solution, in step S2, the emulsion quenching time is controlled to be 5-9S during the emulsion quenching process.
In a preferred embodiment of the present invention, in step S2, the emulsion quenching is specifically,
heating and insulating the elastic bearing bush blank obtained after machining at 850 ℃ for 1.5h, then heating and insulating at 830 ℃ for 1.0h, then discharging the blank from the furnace and putting the blank into the emulsion for quenching for 6s, and controlling the temperature of the emulsion to be 6-8 ℃ constantly in the emulsion quenching process.
In the above technical solution, in the step S3, the tempering treatment is to heat the elastic bearing bush blank after the emulsion is quenched at 160-210 ℃ for 1.5-2.5 h.
Further, in the above technical solution, in the step S3, the tempering treatment is specifically,
heating the elastic bearing bush blank after the emulsion quenching at the temperature of 160-165 ℃ for 1.0h, and then heating at the temperature of 200-210 ℃ for 1.0-1.5 h.
Still further, in the above technical solution, in step S1, the metal blank is a 65 manganese hollow cylindrical blank.
In detail, in a specific embodiment of the present invention, in step S1, the machining includes:
(1) finish machining the outer cylindrical surface by taking the inner hole as a reference;
(2) finish machining end faces, oblique angles, inner cylindrical surfaces, rabbets, steps, clamping grooves and inner containing surfaces by taking the finish machined outer cylindrical surfaces as reference;
(3) and (4) processing a positioning pin hole, a side crack-stopping hole, a crack-stopping hole and an auxiliary hole by taking the outer cylindrical surface and the end surface after finish machining as references.
Further, in the above technical solution, step S3 further includes:
after the wire cutting, a PVD plating process is performed on the surface of the workpiece divided into two parts.
The invention also provides the gapless elastic bearing bush of the rolling die processed by the processing method.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the processing method of the gapless elastic bearing bush of the rolling die, provided by the invention, the technological parameters of emulsion quenching and tempering treatment are further optimized, so that the deformation of the processed workpiece is small, the size precision, the surface roughness, the hardness and the like of the workpiece all reach international advanced levels, and the requirements of practical application can be met;
(2) the processing method of the gapless elastic bearing bush of the rolling die provided by the invention has the advantages of simple steps, controllable technical process, easily-obtained and cheap raw materials, low energy consumption in the production process, and excellent comprehensive performance and good practical application prospect, and the used equipment is common equipment in the field, and is easy for large-scale production.
Detailed Description
The present invention is further described in detail below with reference to specific examples so that those skilled in the art can more clearly understand the present invention.
The following examples are given for the purpose of illustration only and are not intended to limit the scope of the invention.
All other embodiments obtained by a person skilled in the art based on the specific embodiments of the present invention without any inventive step are within the scope of the present invention.
In the examples of the present invention, unless otherwise specified, all technical means used are conventional means well known to those skilled in the art.
In the examples of the present invention, the raw materials used were all commercially available products.
Example 1
The embodiment of the invention provides a method for processing a gapless elastic bearing bush of a rolling die, which comprises the following steps:
s1, machining a metal blank according to a preset size, wherein the metal blank is a 65-manganese hollow cylindrical blank;
s2, heating the elastic bearing bush blank obtained after machining at 845 ℃ for 2.0h, discharging, and quenching the emulsion, wherein the initial temperature of the emulsion is controlled to be 6 ℃, and the quenching time of the emulsion is controlled to be 8S;
s3, heating the elastic bearing bush blank after the emulsion is quenched at 165 ℃ for 2.5 hours, and eliminating internal pressure;
s4, processing an expansion groove by wire cutting, dividing the workpiece into two parts, and finally performing PVD (physical vapor deposition) coating treatment on the surfaces of the two parts of the workpiece obtained by division;
specifically, in step S1, the machining includes:
(1) finish machining the outer cylindrical surface by taking the inner hole as a reference;
(2) finish machining end faces, oblique angles, inner cylindrical surfaces, rabbets, steps, clamping grooves and inner containing surfaces by taking the finish machined outer cylindrical surfaces as reference;
(3) and (4) processing a positioning pin hole, a side crack-stopping hole, a crack-stopping hole and an auxiliary hole by taking the outer cylindrical surface and the end surface after finish machining as references.
Example 2
The embodiment of the invention provides a method for processing a gapless elastic bearing bush of a rolling die, which comprises the following steps:
s1, machining a metal blank according to a preset size, wherein the metal blank is a 65-manganese hollow cylindrical blank;
s2, heating the elastic bearing bush blank obtained after machining at 820 ℃ for 2.5 hours, discharging, and quenching the emulsion, wherein the initial temperature of the emulsion is controlled to be 9 ℃, and the quenching time of the emulsion is controlled to be 5S;
s3, heating the elastic bearing bush blank after the emulsion is quenched at 210 ℃ for 1.5h, and eliminating internal pressure;
s4, processing an expansion groove by wire cutting, dividing the workpiece into two parts, and finally performing PVD (physical vapor deposition) coating treatment on the surfaces of the two parts of the workpiece obtained by division;
specifically, in step S1, the machining includes:
(1) finish machining the outer cylindrical surface by taking the inner hole as a reference;
(2) finish machining end faces, oblique angles, inner cylindrical surfaces, rabbets, steps, clamping grooves and inner containing surfaces by taking the finish machined outer cylindrical surfaces as reference;
(3) and (4) processing a positioning pin hole, a side crack-stopping hole, a crack-stopping hole and an auxiliary hole by taking the outer cylindrical surface and the end surface after finish machining as references.
Example 3
The embodiment of the invention provides a method for processing a gapless elastic bearing bush of a rolling die, which comprises the following steps:
s1, machining a metal blank according to a preset size, wherein the metal blank is a 65-manganese hollow cylindrical blank;
s2, heating and preserving heat of the elastic bearing bush blank obtained after machining at 850 ℃ for 1.5h, then heating and preserving heat at 830 ℃ for 1.0h, then discharging the elastic bearing bush blank out of the furnace, putting the elastic bearing bush blank into emulsion for quenching for 6S, and controlling the temperature of the emulsion to be 7 ℃ constantly in the emulsion quenching process by adding a large amount of emulsion;
s3, heating the elastic bearing bush blank after the emulsion is quenched at 165 ℃ for 1.0h, and then heating at 205 ℃ for 1.5h to eliminate internal pressure;
s4, processing an expansion groove by wire cutting, dividing the workpiece into two parts, and finally performing PVD (physical vapor deposition) coating treatment on the surfaces of the two parts of the workpiece obtained by division;
specifically, in step S1, the machining includes:
(1) finish machining the outer cylindrical surface by taking the inner hole as a reference;
(2) finish machining end faces, oblique angles, inner cylindrical surfaces, rabbets, steps, clamping grooves and inner containing surfaces by taking the finish machined outer cylindrical surfaces as reference;
(3) and (4) processing a positioning pin hole, a side crack-stopping hole, a crack-stopping hole and an auxiliary hole by taking the outer cylindrical surface and the end surface after finish machining as references.
Example 4
The embodiment of the invention provides a method for processing a gapless elastic bearing bush of a rolling die, which comprises the following steps:
s1, machining a metal blank according to a preset size, wherein the metal blank is a 65-manganese hollow cylindrical blank;
s2, heating and preserving heat of the elastic bearing bush blank obtained after machining at 850 ℃ for 1.5h, then heating and preserving heat at 830 ℃ for 1.0h, then discharging the elastic bearing bush blank out of the furnace, putting the elastic bearing bush blank into emulsion for quenching for 6S, and controlling the temperature of the emulsion to be 6 ℃ constantly in the emulsion quenching process by adding a large amount of emulsion;
s3, heating the elastic bearing bush blank after the emulsion is quenched at 165 ℃ for 2.5 hours, and eliminating internal pressure;
s4, processing an expansion groove by wire cutting, dividing the workpiece into two parts, and finally performing PVD (physical vapor deposition) coating treatment on the surfaces of the two parts of the workpiece obtained by division;
specifically, in step S1, the machining includes:
(1) finish machining the outer cylindrical surface by taking the inner hole as a reference;
(2) finish machining end faces, oblique angles, inner cylindrical surfaces, rabbets, steps, clamping grooves and inner containing surfaces by taking the finish machined outer cylindrical surfaces as reference;
(3) and (4) processing a positioning pin hole, a side crack-stopping hole, a crack-stopping hole and an auxiliary hole by taking the outer cylindrical surface and the end surface after finish machining as references.
Example 5
The embodiment of the invention provides a method for processing a gapless elastic bearing bush of a rolling die, which comprises the following steps:
s1, machining a metal blank according to a preset size, wherein the metal blank is a 65-manganese hollow cylindrical blank;
s2, heating the elastic bearing bush blank obtained after machining at 845 ℃ for 2.0h, discharging, and quenching the emulsion, wherein the initial temperature of the emulsion is controlled to be 6 ℃, and the quenching time of the emulsion is controlled to be 8S;
s3, heating the elastic bearing bush blank after the emulsion is quenched at 160 ℃ for 1.0h, and then heating at 210 ℃ for 1.5h to eliminate internal pressure;
s4, processing an expansion groove by wire cutting, dividing the workpiece into two parts, and finally performing PVD (physical vapor deposition) coating treatment on the surfaces of the two parts of the workpiece obtained by division;
specifically, in step S1, the machining includes:
(1) finish machining the outer cylindrical surface by taking the inner hole as a reference;
(2) finish machining end faces, oblique angles, inner cylindrical surfaces, rabbets, steps, clamping grooves and inner containing surfaces by taking the finish machined outer cylindrical surfaces as reference;
(3) and (4) processing a positioning pin hole, a side crack-stopping hole, a crack-stopping hole and an auxiliary hole by taking the outer cylindrical surface and the end surface after finish machining as references.
Comparative example 1
The invention provides a method for processing a gapless elastic bearing bush of a rolling die, which comprises the following steps:
s1, machining a metal blank according to a preset size, wherein the metal blank is a No. 45 steel hollow cylindrical blank;
s2, heating the elastic bearing bush blank obtained after machining at 750 ℃ for 2.0h, discharging, and quenching the emulsion, wherein the initial temperature of the emulsion is controlled to be 6 ℃, and the quenching time of the emulsion is controlled to be 9S;
s3, heating the elastic bearing bush blank after the emulsion is quenched at 240 ℃ for 1.5h, and eliminating internal pressure;
s4, processing an expansion groove by wire cutting, dividing the workpiece into two parts, and finally performing PVD (physical vapor deposition) coating treatment on the surfaces of the two parts of the workpiece obtained by division;
specifically, in step S1, the machining includes:
(1) finish machining the outer cylindrical surface by taking the inner hole as a reference;
(2) finish machining end faces, oblique angles, inner cylindrical surfaces, rabbets, steps, clamping grooves and inner containing surfaces by taking the finish machined outer cylindrical surfaces as reference;
(3) and (4) processing a positioning pin hole, a side crack-stopping hole, a crack-stopping hole and an auxiliary hole by taking the outer cylindrical surface and the end surface after finish machining as references.
Comparative example 2
The invention provides a method for processing a gapless elastic bearing bush of a rolling die, which comprises the following steps:
s1, machining a metal blank according to a preset size, wherein the metal blank is a 65-manganese hollow cylindrical blank;
s2, heating the elastic bearing bush blank obtained after machining at 845 ℃ for 2.0h, discharging, and quenching the emulsion, wherein the initial temperature of the emulsion is controlled to be 6 ℃, and the quenching time of the emulsion is controlled to be 8S;
s3, processing an expansion groove by wire cutting, dividing the workpiece into two parts, and finally performing PVD (physical vapor deposition) coating treatment on the surfaces of the two parts of the workpiece obtained by division;
specifically, in step S1, the machining includes:
(1) finish machining the outer cylindrical surface by taking the inner hole as a reference;
(2) finish machining end faces, oblique angles, inner cylindrical surfaces, rabbets, steps, clamping grooves and inner containing surfaces by taking the finish machined outer cylindrical surfaces as reference;
(3) and (4) processing a positioning pin hole, a side crack-stopping hole, a crack-stopping hole and an auxiliary hole by taking the outer cylindrical surface and the end surface after finish machining as references.
Comparative example 3
The invention provides a method for processing a gapless elastic bearing bush of a rolling die, which comprises the following steps:
s1, machining a metal blank according to a preset size, wherein the metal blank is a No. 45 steel hollow cylindrical blank;
s2, heating the elastic bearing bush blank obtained after machining at 240 ℃ for 1.5h, and eliminating internal pressure;
s3, processing an expansion groove by wire cutting, dividing the workpiece into two parts, and finally performing PVD (physical vapor deposition) coating treatment on the surfaces of the two parts of the workpiece obtained by division;
specifically, in step S1, the machining includes:
(1) finish machining the outer cylindrical surface by taking the inner hole as a reference;
(2) finish machining end faces, oblique angles, inner cylindrical surfaces, rabbets, steps, clamping grooves and inner containing surfaces by taking the finish machined outer cylindrical surfaces as reference;
(3) and (4) processing a positioning pin hole, a side crack-stopping hole, a crack-stopping hole and an auxiliary hole by taking the outer cylindrical surface and the end surface after finish machining as references.
The performance of the gapless elastic bearing bush of the rolling die prepared in the above examples 1 to 5 and comparative examples 1 to 3 was tested, and the specific test is shown in table 1 below.
TABLE 1 Performance test results of gapless elastic bearing bush of rolling die
According to the processing method of the gapless elastic bearing bush of the rolling die, provided by the embodiment of the invention, the technological parameters of emulsion quenching and tempering treatment are further optimized, so that the deformation of the processed workpiece is small, the size precision, the surface roughness, the hardness and the like of the workpiece reach international advanced levels, and the requirements of practical application can be met; the processing method of the gapless elastic bearing bush of the rolling die provided by the embodiment of the invention has the advantages of simple steps, controllable technical process, easily-available and cheap raw materials, low energy consumption in the production process, excellent comprehensive performance of the manufactured gapless elastic bearing bush of the rolling die and good practical application prospect, and the used equipment is common equipment in the field and is easy for large-scale production.
It should be noted that the above examples are only for further illustration and description of the technical solution of the present invention, and are not intended to further limit the technical solution of the present invention, and the method of the present invention is only a preferred embodiment, and is not intended to limit the protection scope of the present 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 (10)
1. A processing method of a gapless elastic bearing bush of a rolling die is characterized in that,
the method comprises the following steps:
s1, machining the metal blank according to the preset size;
s2, quenching the emulsion;
s3, tempering to eliminate the internal pressure;
and S4, performing linear cutting machining on the expansion groove, and dividing the workpiece into two parts.
2. The method for processing the gapless elastic bearing bush of the rolling die as claimed in claim 1, wherein,
in the step S2, in the step S,
and the emulsion quenching is to heat the elastic bearing bush blank obtained after machining at the temperature of 820-850 ℃ for 1.5-2.5h, and then take the blank out of the furnace for quenching.
3. The method for processing the gapless elastic bearing bush of the rolling die as claimed in claim 2, wherein,
in step S2, in the process of emulsion quenching,
controlling the temperature of the emulsion to be 5-12 ℃.
And/or controlling the quenching time of the emulsion to be 5-9 s.
4. The method for machining a gapless elastic bearing shell of a rolling die according to any one of claims 1 to 3, wherein,
in step S2, the emulsion quenching is specifically,
heating and insulating the elastic bearing bush blank obtained after machining at 850 ℃ for 1.5h, then heating and insulating at 830 ℃ for 1.0h, then discharging the blank from the furnace and putting the blank into the emulsion for quenching for 6s, and controlling the temperature of the emulsion to be 6-8 ℃ constantly in the emulsion quenching process.
5. The method for processing the gapless elastic bearing bush of the rolling die as claimed in claim 1, wherein,
in the step S3, in the step S,
the tempering treatment is to heat the elastic bearing bush blank after the emulsion is quenched at the temperature of 160-210 ℃ for 1.5-2.5 h.
6. The method for processing the gapless elastic bearing bush of the rolling die as claimed in claim 5, wherein,
in step S3, the tempering treatment is specifically,
heating the elastic bearing bush blank after the emulsion quenching at the temperature of 160-165 ℃ for 1.0h, and then heating at the temperature of 200-210 ℃ for 1.0-1.5 h.
7. The method for machining a gapless elastic bearing shell of a rolling die according to any one of claims 1 to 6, wherein,
in step S1, the metal blank is a 65-manganese hollow cylindrical blank.
8. The method for processing the gapless elastic bearing bush of the rolling die as claimed in claim 7, wherein,
in step S1, the machining includes:
(1) finish machining the outer cylindrical surface by taking the inner hole as a reference;
(2) finish machining end faces, oblique angles, inner cylindrical surfaces, rabbets, steps, clamping grooves and inner containing surfaces by taking the finish machined outer cylindrical surfaces as reference;
(3) and (4) processing a positioning pin hole, a side crack-stopping hole, a crack-stopping hole and an auxiliary hole by taking the outer cylindrical surface and the end surface after finish machining as references.
9. The method for machining a gapless elastic bearing shell of a rolling die according to any one of claims 1 to 6, wherein,
in step S3, the method further includes:
after the wire cutting, a PVD plating process is performed on the surface of the workpiece divided into two parts.
10. A rolling die gapless elastic bearing shell processed by the processing method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110596349.6A CN113245794A (en) | 2021-05-30 | 2021-05-30 | Gapless elastic bearing bush of rolling die and machining method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110596349.6A CN113245794A (en) | 2021-05-30 | 2021-05-30 | Gapless elastic bearing bush of rolling die and machining method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114227176A (en) * | 2021-12-30 | 2022-03-25 | 哈尔滨汽轮机厂有限责任公司 | Bearing pad machining method |
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| GB9007163D0 (en) * | 1989-04-05 | 1990-05-30 | Skf Gmbh | Process for the production of rolling-bearing elements from through-hardening rolling-bearing steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114227176A (en) * | 2021-12-30 | 2022-03-25 | 哈尔滨汽轮机厂有限责任公司 | Bearing pad machining method |
| CN114227176B (en) * | 2021-12-30 | 2023-09-29 | 哈尔滨汽轮机厂有限责任公司 | Bearing pad processing method |
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Application publication date: 20210813 |