CN110625139A - Machining process for bushing with conical hole - Google Patents
Machining process for bushing with conical hole Download PDFInfo
- Publication number
- CN110625139A CN110625139A CN201910948576.3A CN201910948576A CN110625139A CN 110625139 A CN110625139 A CN 110625139A CN 201910948576 A CN201910948576 A CN 201910948576A CN 110625139 A CN110625139 A CN 110625139A
- Authority
- CN
- China
- Prior art keywords
- turning
- diameter
- heat treatment
- hole
- bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
- Forging (AREA)
Abstract
The invention discloses a machining process of a bushing with a tapered hole, which comprises the following steps: s1, guiding the bar stock of the corresponding material mark; s2, performing 100% light splitting inspection as required; s3, turning a tool to smooth the end face, and roughly turning a large-diameter excircle, a small-diameter excircle and an inner hole; s4, performing heat treatment as required, wherein the strength required by the heat treatment reaches sigma b =1175 +/-100 MPa; s5, clamping the small-diameter outer circle end and the smooth end face, and finely turning a tapered hole; s6, turning around, positioning by using a taper hole, and finely turning a large-diameter excircle and a small-diameter excircle; s7, performing heat treatment as required; tempering at low temperature; and S8, delivery and delivery. According to the process method, the tapered hole is finely turned firstly, then the outer circle is finely turned, so that circle run-out can be effectively guaranteed, technical requirements are met, and the quality of parts is guaranteed; the processing method is practical, convenient to operate, popular and easy to understand, and easy to popularize and learn.
Description
Technical Field
The invention relates to the technical field of precision manufacturing and machining of aviation machinery, in particular to a machining process of a bushing with a tapered hole.
Background
The bush is common lathe work part, belongs to axle class spare, and 95% of lathe work is axle class spare processing. And for the bushing parts containing the conventional round holes and shaft shoulders, conventional turning is adopted to finish the process. The existing bushing has the advantages that the bushing structure is not complex on the surface, but the technical requirement is high, the size requirement is precise, the tapered hole is contained, the circular runout phi 0.03 of the tapered hole and the excircle is guaranteed, the positioning and clamping are needed for turning, and the technical requirement is very strict. At this moment, the processing technical scheme of the bush needs to be fully considered, a reasonable processing technical scheme is provided, and the technical requirements are met.
Disclosure of Invention
In order to solve the problems, the invention provides a machining process of a bush with a conical hole, which can effectively ensure circular run-out, meet the technical requirements and the like, and ensure the quality of parts.
The technical scheme adopted by the invention is as follows: a machining process of a bushing with a tapered hole comprises the following steps:
s1, guiding the bar stock of the corresponding material mark;
s2, performing 100% light splitting inspection as required;
s3, clamping one end of the bar, turning the end face of the blank on the right side of the bar into a plane by using a turning tool, and roughly turning a large-diameter excircle, a small-diameter excircle and an inner hole;
s4, carrying out heat treatment on different materials according to requirements;
s5, clamping the small-diameter outer circular end, turning the end face of the blank at the right side of the bar, which is not clamped, into a plane by using a turning tool, and finely turning a tapered hole;
s6, turning around, positioning by using a taper hole, and finely turning a large-diameter excircle and a small-diameter excircle;
s7, performing heat treatment as required; tempering at low temperature;
and S8, delivery and delivery.
Further, in the step S1, the finish-forged bar material with a diameter of 25mm and a single blanking length of 25mm is used as the bar material, and the material is 30 CrMnSiA.
Further, in step S3, the inner hole is a through hole penetrating through the entire bushing.
Further, in step S3, a finish turning allowance after the heat treatment needs to be retained.
Further, in the step S3, the finish turning allowance is 2 ‰ ~ 5 ‰ of the length of the quenched blank.
Further, in the step S4, the heat treatment requires that the strength be σ b =1175 ± 100 MPa.
Further, in the step S6, a matched tapered pin shaft is needed, and the pin shaft is polished once before use and cannot be detached, so that the outer circle finish turning is completed once to ensure coaxiality.
Further, in step S6, the obtained bushing with the tapered hole ensures a circular runout Φ =0.03 between the tapered hole and the outer circle.
The invention has the beneficial effects that: 1. the conical hole is finely turned firstly, and then the outer circle is finely turned, so that the circle run-out can be effectively ensured, the technical requirements and the like are met, and the quality of parts is also ensured;
2. the process scheme is in line with reality, convenient to operate, popular and easy to understand, and the processing method is easy to popularize and learn;
3. the tapered hole positioning pin shaft is simple to process, can be used in a plurality of holes on one shaft, is suitable for batch processing, and has better economic benefit.
Drawings
FIG. 1 is a schematic diagram of rough turning according to an embodiment of the present invention;
FIG. 2 is a schematic view of the fine turning of a tapered hole according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the fine turning of the outer circle according to the embodiment of the present invention.
Detailed Description
For the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
Examples
As shown in fig. 1 to 3: a processing scheme of a bushing with a tapered hole comprises the following steps:
s1: taking 30CrMnSiA-J phi 25 multiplied by 25 (a single piece of precision forging bar material with the diameter of 25mm and the blanking length of 25 mm), filling part information such as material marks, furnace batch numbers and the like into corresponding columns, and recording;
s2: 30CrMnSiA requires 100% spectroscopic examination, materials: 30 CrMnSiA;
s3: the three-jaw chuck clamps the bar, a turning tool is used for turning the end face of a blank on the right side of the bar into a plane, a large-diameter excircle, a small-diameter excircle and an inner hole are roughly turned, the large-diameter excircle phi 1=24mm, the small-diameter excircle phi 2=16mm and the inner hole phi 3=9mm, the length of a small-diameter cylindrical surface is ensured to be L1=14mm, the overall length of a part is L2=18mm, and a certain finish turning allowance after heat treatment is reserved at the moment;
s4: quenching is needed for 30CrMnSiA, and the heat treatment strength is arranged to reach sigma b =1175 +/-100 MPa;
s5: clamping a cylindrical surface with phi 2=16mm, turning the end face of a blank at the right side of the bar, which is not clamped, into a plane by using a turning tool, and finely turning a tapered hole, wherein the small end face phi 4=9.5mm of the tapered hole ensures that the length direction of the part is L3=17mm, and the size of a shaft shoulder is L4=3 mm;
s6: turning around, clamping a positioning taper pin by a three-jaw chuck, sleeving a bush 2 on the surface of a tapered pin shaft 1, positioning by a tapered hole, and finely turning the outer circle to phi 5=15.8 (-0.06/-0.02); note that: when the conical pin shaft is used, the pin shaft is polished once and cannot be detached, and the excircle finish turning is needed once to ensure the coaxiality and ensure the circular run-out to be 0.03;
s7: and (3) heat treatment: low-temperature tempering is carried out on 30 CrMnSiA;
s8: and (6) delivery for inspection.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (8)
1. The machining process of the bushing with the tapered hole is characterized by comprising the following steps of:
s1, guiding the bar stock of the corresponding material mark;
s2, performing 100% light splitting inspection as required;
s3, clamping one end of the bar, turning the end face of the blank on the right side of the bar into a plane by using a turning tool, and roughly turning a large-diameter excircle, a small-diameter excircle and an inner hole;
s4, carrying out heat treatment on different materials according to requirements;
s5, clamping the small-diameter outer circular end, turning the end face of the blank at the right side of the bar, which is not clamped, into a plane by using a turning tool, and finely turning a tapered hole;
s6, turning around, positioning by using a taper hole, and finely turning a large-diameter excircle and a small-diameter excircle;
s7, performing heat treatment as required; tempering at low temperature;
and S8, delivery and delivery.
2. The process of claim 1, wherein in step S1, the bar material is 30CrMnSiA, and the single piece of precision-forged bar material with a diameter of 25mm and a blanking length of 25mm is used as the bar material.
3. The process of claim 1, wherein in step S3, the inner hole is a through hole penetrating the whole bushing.
4. The process of claim 1, wherein in step S3, a finish turning allowance after heat treatment is required.
5. The process of claim 4, wherein in the step S3, the finish turning allowance is 2 ‰ ~ 5 ‰ of the quenched blank length.
6. The process of claim 1, wherein in step S4, the heat treatment requires that the strength be σ b =1175 ± 100 MPa.
7. The process of claim 1, wherein in step S6, the taper pin shaft is used, and before use, the pin shaft is finished once and cannot be removed, and the cylindrical finish turning is completed once to ensure the coaxiality.
8. The process of claim 1, wherein in step S6, the obtained bush with tapered hole has a circular runout Φ =0.03 from the outer circle of the tapered hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910948576.3A CN110625139A (en) | 2019-10-08 | 2019-10-08 | Machining process for bushing with conical hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910948576.3A CN110625139A (en) | 2019-10-08 | 2019-10-08 | Machining process for bushing with conical hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110625139A true CN110625139A (en) | 2019-12-31 |
Family
ID=68975741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910948576.3A Pending CN110625139A (en) | 2019-10-08 | 2019-10-08 | Machining process for bushing with conical hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110625139A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113601111A (en) * | 2021-07-21 | 2021-11-05 | 南京航空航天大学 | Method for processing multi-slot bushing |
| CN114453845A (en) * | 2022-03-03 | 2022-05-10 | 襄阳佰誉机械有限公司 | Machining process for high-precision deformation-resistant non-standard bushing |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4939827A (en) * | 1987-10-20 | 1990-07-10 | Diado Metal Company Ltd. | Method of manufacturing a bearing device including a housing with a flange at one end thereof and a bearing bush press-fitted thereinto |
| CN103056392A (en) * | 2012-10-17 | 2013-04-24 | 南京梅山冶金发展有限公司 | Clamping and machining method for large thin-wall taper sleeves |
| CN104625614A (en) * | 2014-12-09 | 2015-05-20 | 陈建秋 | Method for machining stainless steel deep-hole thin-wall part |
| CN105150000A (en) * | 2015-07-21 | 2015-12-16 | 济南重工股份有限公司 | Machining tool and method for large thin-walled conical sleeve |
| JP2016118229A (en) * | 2014-12-19 | 2016-06-30 | パナソニックＩｐマネジメント株式会社 | Sliding bearing structure, and method of manufacturing bearing in the sliding bearing |
| CN106015339A (en) * | 2016-06-30 | 2016-10-12 | 湖北三江航天红阳机电有限公司 | Machining method for conical-hole, thin-walled and high-precision shaft sleeve type part |
| US20170037904A1 (en) * | 2015-08-05 | 2017-02-09 | Schaeffler Technologies AG & Co. KG | Radial needle bearing with flange cutouts |
| CN109746638A (en) * | 2018-01-22 | 2019-05-14 | 天津市元远合成科技发展有限公司 | A kind of raising bushing inner circle precision process |
-
2019
- 2019-10-08 CN CN201910948576.3A patent/CN110625139A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4939827A (en) * | 1987-10-20 | 1990-07-10 | Diado Metal Company Ltd. | Method of manufacturing a bearing device including a housing with a flange at one end thereof and a bearing bush press-fitted thereinto |
| CN103056392A (en) * | 2012-10-17 | 2013-04-24 | 南京梅山冶金发展有限公司 | Clamping and machining method for large thin-wall taper sleeves |
| CN104625614A (en) * | 2014-12-09 | 2015-05-20 | 陈建秋 | Method for machining stainless steel deep-hole thin-wall part |
| JP2016118229A (en) * | 2014-12-19 | 2016-06-30 | パナソニックＩｐマネジメント株式会社 | Sliding bearing structure, and method of manufacturing bearing in the sliding bearing |
| CN105150000A (en) * | 2015-07-21 | 2015-12-16 | 济南重工股份有限公司 | Machining tool and method for large thin-walled conical sleeve |
| US20170037904A1 (en) * | 2015-08-05 | 2017-02-09 | Schaeffler Technologies AG & Co. KG | Radial needle bearing with flange cutouts |
| CN106015339A (en) * | 2016-06-30 | 2016-10-12 | 湖北三江航天红阳机电有限公司 | Machining method for conical-hole, thin-walled and high-precision shaft sleeve type part |
| CN109746638A (en) * | 2018-01-22 | 2019-05-14 | 天津市元远合成科技发展有限公司 | A kind of raising bushing inner circle precision process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113601111A (en) * | 2021-07-21 | 2021-11-05 | 南京航空航天大学 | Method for processing multi-slot bushing |
| CN114453845A (en) * | 2022-03-03 | 2022-05-10 | 襄阳佰誉机械有限公司 | Machining process for high-precision deformation-resistant non-standard bushing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205363303U (en) | Outer star gear internal expanding location locking clamp | |
| JP2004167668A (en) | Manufacturing method of bearing ring of roller bearing, manufacturing device of bearing ring of roller bearing and roller bearing | |
| CN110625139A (en) | Machining process for bushing with conical hole | |
| CN109261987A (en) | A kind of Vehicle Processing manufacturing method of large diameter thin wall ring-shaped work pieces | |
| CN105150000A (en) | Machining tool and method for large thin-walled conical sleeve | |
| CN105750563A (en) | Method for enhancing hard turning circularity of thin-wall annular parts | |
| CN105499935B (en) | A kind of processing technology that elongated deep hole complex parts are produced in enormous quantities | |
| CN108994554A (en) | A kind of high hard high-precision low-carbon alloy steel ring gear machining method | |
| CN201338095Y (en) | Double-tool-rest numerical control machine tool | |
| CN104384531A (en) | Post-tensioning chuck device | |
| CN201529913U (en) | Turning thin-wall sleeve clamp without chucks | |
| CN208408768U (en) | A kind of drive bevel gear tooth Profile Machining bipyramid positioning tool | |
| CN202271190U (en) | Follower rest | |
| CN104985401A (en) | Joint yoke machining method | |
| CN210360083U (en) | Shaft sleeve matched type positioning tool | |
| CN113118801A (en) | Special fixture for copper bush part machining | |
| CN101850436B (en) | Vertical hole-enlarging positioning guided tooling | |
| CN116275927A (en) | Processing method of high-precision spline slender shaft | |
| CN109176160B (en) | Precision stepped shaft cylindrical grinding process | |
| CN105666171A (en) | Processing method of thin-wall ring part | |
| CN204018740U (en) | The Vehicle Processing of clutch can cylindrical is top | |
| CN106346026A (en) | Method for turning spherical shaft workpiece through ordinary lathe | |
| CN108857481B (en) | Inner hole alignment device and method suitable for machining slender pipe parts | |
| CN209223666U (en) | The clamping tooling of long hollow shaft class part concentricity processing | |
| CN210412681U (en) | Center hole machining tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191231 |