CN113352134A - Manufacturing method of over-positioning type part - Google Patents
Manufacturing method of over-positioning type part Download PDFInfo
- Publication number
- CN113352134A CN113352134A CN202110785286.9A CN202110785286A CN113352134A CN 113352134 A CN113352134 A CN 113352134A CN 202110785286 A CN202110785286 A CN 202110785286A CN 113352134 A CN113352134 A CN 113352134A
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- China
- Prior art keywords
- outer ring
- ring
- inner ring
- pin
- manufacturing
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000003754 machining Methods 0.000 claims abstract description 15
- 238000005266 casting Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 18
- 238000003801 milling Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a manufacturing method of an over-positioning type part, and meanwhile, the manufacturing method enables the part to have no obvious eyelet marks on appearance and to have better surface quality. A manufacturing method of an over-positioning type part, wherein the over-positioning type part comprises an inner ring and an outer ring which are formed by split casting, and the manufacturing method comprises the following steps: roughly machining an inner ring; marking pin hole positions on the end surfaces of the inner ring and the outer ring according to the characteristics of the over-positioning type part to find a line; marking lines are reserved on the inner ring and the outer ring, the outer circle surface of the outer ring is to be subjected to finish machining, and the other surfaces to be machined of the inner ring and the outer ring are machined in place; assembling the inner ring and the outer ring into a whole in an interference fit manner; aligning and scribing, simultaneously processing pin holes on the inner ring and the outer ring, and installing pins; and (4) processing the outer circular surface of the outer ring in place.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a manufacturing method of an over-positioning type part.
Background
The supercharger nozzle ring part is generally formed by casting, so that blades and shapes can be conveniently and quickly obtained, but when the requirement on the dimensional accuracy of the part is high or the shape is large, the casting accuracy is not enough, defects are easy to generate, and the design requirement is difficult to meet, so that the supercharger nozzle ring part is manufactured by machining. The manufacturing mode has the advantages that the complex structure is simplified into a simple structure, the processing and the manufacturing are convenient, and the precision can be controlled by the processing means because the processing means is used for finishing. The inner and outer rings are generally positioned in an interference or over-fit manner during the manufacturing process, and are connected by using screws. This structure cannot be used when the wall of the part is too thin to mount a screw or the position of the mounting screw is too small to machine a thread. In order to solve the problem, a part-mounting structure of a split type part needs to be newly designed.
Disclosure of Invention
The invention aims to solve the problems of design and processing of parts which are not suitable for cast parts and cannot be connected by using screws, and provides a manufacturing method of an over-positioning type part, which ensures that no obvious eyelet mark exists on the appearance of the part and the surface quality is better.
The purpose of the invention is realized as follows:
a manufacturing method of an over-positioning type part, wherein the over-positioning type part comprises an inner ring and an outer ring which are formed by split casting, and the manufacturing method comprises the following steps:
roughly machining an inner ring;
marking pin hole positions on the end surfaces of the inner ring and the outer ring according to the characteristics of the over-positioning type part to find a line;
marking lines are reserved on the inner ring and the outer ring, the outer circle surface of the outer ring is to be subjected to finish machining, and the other surfaces to be machined of the inner ring and the outer ring are machined in place;
assembling the inner ring and the outer ring into a whole in an interference fit manner;
aligning and scribing, simultaneously processing pin holes on the inner ring and the outer ring, and installing pins;
and (4) processing the outer circular surface of the outer ring in place.
Preferably, the over-locating part is a nozzle ring, the vanes of the nozzle ring are cast and formed on the excircle of the inner ring, the outer ring is circular, and the manufacturing method of the nozzle ring comprises the following steps:
roughly machining the end surface of the inner ring and the outer circular surface of the blade;
processing the blade in place, and marking the thickest part of the blade;
marking a line through the central line of the inner ring, and marking pin hole position alignment lines on the end surfaces of the inner ring and the outer ring corresponding to the marking positions respectively;
marking lines are reserved on the inner ring and the outer ring, the outer circle surface of the outer ring is to be subjected to finish machining, and the other surfaces to be machined of the inner ring and the outer ring are machined in place;
assembling the inner ring and the outer ring into a whole in an interference fit manner;
aligning and scribing, simultaneously processing pin holes on the inner ring and the outer ring, and installing pins;
and (4) processing the outer circular surface of the outer ring in place.
Preferably, the outer circular surfaces of the blades and the inner circular surfaces of the outer ring are conical surfaces which are matched with each other to form axial positioning.
Preferably, the interference between the outer circumferential surface of the vane and the inner circumferential surface of the outer ring is set to 0.1mm to 0.2 mm.
Preferably, each blade is provided with a pin hole and is in pin joint with the outer ring.
Preferably, the number of blades is 10 or more.
Preferably, the outer circumferential surface of the blade is machined by milling.
Preferably, when the pin holes are machined in the inner ring and the outer ring at the same time, one pin is installed when one pin hole is machined until all pin holes are machined and all pins are installed.
Preferably, the length of the pin is larger than the depth of the pin hole, and the exposed pin is removed in the process of machining the outer circular surface of the outer ring in place.
Due to the adoption of the technical scheme, the invention realizes the difficult problem of connection processing of parts which are not suitable for cast parts and cannot be connected by using screws, and meanwhile, the manufacturing method ensures that no obvious eyelet mark exists on the appearance of the parts and the surface quality is better.
Drawings
FIG. 1 is a schematic structural view of an inner ring;
the inner ring with the blade is provided with a pin hole matched with the excircle, and the excircle of the blade is tapered and is used for being matched with the inner hole of the excircle and axially positioning;
FIG. 2 is a schematic structural view of an outer ring;
the outer ring without the blades is provided with a pin hole matched with the inner ring on the wall, and the inner hole is tapered and is used for being matched with the inner ring for axial positioning;
FIG. 3 is a schematic view of the assembled nozzle ring;
after assembly, 27 pins are used for over-assembly, so that the inner ring and the outer ring are over-positioned, parts are fastened, and finally, the outer circle is processed to be smooth, and pin hole traces on the outer wall are removed.
Detailed Description
A manufacturing method of an over-positioning type part is provided, in the embodiment, the over-positioning type part is a nozzle ring.
The processing flow comprises the following steps:
a. the inner ring is roughly machined by using common equipment and conventional machining means, and the blade profile and the pin hole are not machined
b. When the inner ring is used for processing the blade, equipment is used for pointing out the thickest position of the blade by a drill point on the end face of a part
c. The bench worker marks a line by crossing a central circular line and marks a line for aligning the pin hole positions of the inner ring and the outer ring on the end surface
d. Under the condition that the inner ring retains the wire, finishing the part, and paying attention to not processing the pin hole
e. The outer ring is directly processed according to the drawing to the dimensions of all the structures except the pin hole
f. The inner ring and the outer ring are assembled into a whole, so that the assembly interference can meet the requirements of drawings
g. Aligning and scribing, drilling and reaming pin holes on the inner ring and the outer ring simultaneously, and installing a pin at one drilled and reamed pin hole immediately until all pin holes are machined
And (5) turning and finely machining the outer circle according to the requirements of a drawing by a common method, and removing the pin exposed outside.
The design principle is as follows:
a. the inner ring uses a structure with blades, thereby facilitating the milling of a machine tool
b. The excircle part of the inner ring blade is designed to be tapered, and can be effectively axially positioned when being matched with the outer ring, interference relationship is formed when the assembly is convenient, and the interference magnitude is generally set to be 0.1mm-0.2mm
c. The pin hole of the inner ring is arranged at the thicker position of the blade, so that the pin hole is as large as possible
d. The outer ring adopts a circular ring structure, and is convenient to process
e. The inner hole of the outer ring is consistent with the taper of the outer circle of the inner ring, so that the axial positioning can be effectively carried out, and the interference relationship is formed when the assembly is convenient
f. Each blade is required to be provided with a pin hole and a pin, so that the over-positioning capacity is ensured, and the general number is set to be more than 10 uniformly;
g. the outer circle of the part is required to be finely processed after the assembly is finished, so that no pin hole trace is left at the outer circle of the part, and the part is more beautiful
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (9)
1. A manufacturing method of an over-positioning type part, the over-positioning type part comprises an inner ring and an outer ring which are formed by split casting, and the manufacturing method is characterized by comprising the following steps:
roughly machining an inner ring;
marking pin hole positions on the end surfaces of the inner ring and the outer ring according to the characteristics of the over-positioning type part to find a line;
marking lines are reserved on the inner ring and the outer ring, the outer circle surface of the outer ring is to be subjected to finish machining, and the other surfaces to be machined of the inner ring and the outer ring are machined in place;
assembling the inner ring and the outer ring into a whole in an interference fit manner;
aligning and scribing, simultaneously processing pin holes on the inner ring and the outer ring, and installing pins;
and (4) processing the outer circular surface of the outer ring in place.
2. The method of claim 1, wherein the method further comprises: the locating type part is a nozzle ring, blades of the nozzle ring are cast and formed on the excircle of the inner ring, the outer ring is circular, and the nozzle ring manufacturing method comprises the following steps:
roughly machining the end surface of the inner ring and the outer circular surface of the blade;
processing the blade in place, and marking the thickest part of the blade;
marking a line through the central line of the inner ring, and marking pin hole position alignment lines on the end surfaces of the inner ring and the outer ring corresponding to the marking positions respectively;
marking lines are reserved on the inner ring and the outer ring, the outer circle surface of the outer ring is to be subjected to finish machining, and the other surfaces to be machined of the inner ring and the outer ring are machined in place;
assembling the inner ring and the outer ring into a whole in an interference fit manner;
aligning and scribing, simultaneously processing pin holes on the inner ring and the outer ring, and installing pins;
and (4) processing the outer circular surface of the outer ring in place.
3. The method of claim 2, wherein the method further comprises: the outer circle surface of the blade and the inner circle surface of the outer ring are conical surfaces which are matched with each other to form axial positioning.
4. The method of claim 2, wherein the method further comprises: the interference magnitude of the outer circle surface of the blade and the inner circle surface of the outer ring is set to be 0.1mm-0.2 mm.
5. The method of claim 2, wherein the method further comprises: each blade is provided with a pin hole and is in pin joint with the outer ring.
6. A method of manufacturing an over-positioned part according to claim 2 or 5, wherein: the number of the blades is more than 10.
7. The method of claim 2, wherein the method further comprises: and milling the outer circular surface of the blade.
8. The method of claim 2, wherein the method further comprises: when the inner ring and the outer ring are simultaneously processed with pin holes, one pin is installed when one pin hole is processed until all pin hole processing and pin installation are completed.
9. The method of claim 2, wherein the method further comprises: the length of the pin is larger than the depth of the pin hole, and the exposed pin is removed in the process of processing the outer circular surface of the outer ring in place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110785286.9A CN113352134A (en) | 2021-07-12 | 2021-07-12 | Manufacturing method of over-positioning type part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110785286.9A CN113352134A (en) | 2021-07-12 | 2021-07-12 | Manufacturing method of over-positioning type part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113352134A true CN113352134A (en) | 2021-09-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110785286.9A Pending CN113352134A (en) | 2021-07-12 | 2021-07-12 | Manufacturing method of over-positioning type part |
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| Country | Link |
|---|---|
| CN (1) | CN113352134A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3300180A (en) * | 1964-11-17 | 1967-01-24 | Worthington Corp | Segmented diaphragm assembly |
| CN101082423A (en) * | 2006-05-29 | 2007-12-05 | 斯奈克码 | Air-flow guiding device at the inlet of the combustor of a turbomachine |
| CN204419278U (en) * | 2014-12-23 | 2015-06-24 | 宁国市华成金研科技有限公司 | Nozzle ring |
| CN105081760A (en) * | 2014-04-30 | 2015-11-25 | 西门子公司 | Method for assembling nozzle ring |
| CN206054014U (en) * | 2016-08-31 | 2017-03-29 | 中国船舶重工集团公司第七�三研究所 | Steam turbine rotary spacing plate |
| CN109538306A (en) * | 2018-12-12 | 2019-03-29 | 中国北方发动机研究所(天津) | A kind of nozzle ring of anti-hot tearing |
| CN112719810A (en) * | 2020-12-25 | 2021-04-30 | 重庆江增船舶重工有限公司 | Manufacturing method of split type nozzle ring |
-
2021
- 2021-07-12 CN CN202110785286.9A patent/CN113352134A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3300180A (en) * | 1964-11-17 | 1967-01-24 | Worthington Corp | Segmented diaphragm assembly |
| CN101082423A (en) * | 2006-05-29 | 2007-12-05 | 斯奈克码 | Air-flow guiding device at the inlet of the combustor of a turbomachine |
| CN105081760A (en) * | 2014-04-30 | 2015-11-25 | 西门子公司 | Method for assembling nozzle ring |
| CN204419278U (en) * | 2014-12-23 | 2015-06-24 | 宁国市华成金研科技有限公司 | Nozzle ring |
| CN206054014U (en) * | 2016-08-31 | 2017-03-29 | 中国船舶重工集团公司第七�三研究所 | Steam turbine rotary spacing plate |
| CN109538306A (en) * | 2018-12-12 | 2019-03-29 | 中国北方发动机研究所(天津) | A kind of nozzle ring of anti-hot tearing |
| CN112719810A (en) * | 2020-12-25 | 2021-04-30 | 重庆江增船舶重工有限公司 | Manufacturing method of split type nozzle ring |
Non-Patent Citations (1)
| Title |
|---|
| A.3.西姆松: "《柴油机废气涡轮增压》", 31 December 1963, 上海科学技术出版社 * |
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| 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 |
Application publication date: 20210907 |
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| RJ01 | Rejection of invention patent application after publication |