CN113977201A - Method for machining clamping groove of externally-hung ring segment - Google Patents
Method for machining clamping groove of externally-hung ring segment Download PDFInfo
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- CN113977201A CN113977201A CN202111333349.3A CN202111333349A CN113977201A CN 113977201 A CN113977201 A CN 113977201A CN 202111333349 A CN202111333349 A CN 202111333349A CN 113977201 A CN113977201 A CN 113977201A
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- hanging ring
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- clamping groove
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- 238000000034 method Methods 0.000 title claims description 18
- 238000003754 machining Methods 0.000 title description 7
- 238000003466 welding Methods 0.000 claims abstract description 58
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 238000003672 processing method Methods 0.000 claims abstract description 3
- 238000005520 cutting process Methods 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A processing method of a clamping groove of an externally hung ring segment comprises the following steps: step S1: clamping and positioning a workpiece: splicing the three external ring segments into a ring shape, installing the ring segments on a spigot positioning fixture and pressing the ring segments tightly; step S2: positioning welding: positioning welding is carried out on the connecting position between two adjacent external hanging ring sections; step S3: numerical control turning: turning clamping grooves in clamping blocks on the three external hanging ring segments after welding by using a numerical control vertical lathe; step S4: polishing spot weld beading: after turning is finished, polishing the weld beading of the tack welding under the clamping and compressing state, so that the surface has no obvious welding trace; step S5: and loosening the seam allowance positioning fixture, taking the three external ring segments out of the seam allowance positioning fixture, and separating the three external ring segments from the welding part to obtain the three external ring segments for finishing the processing of the clamping groove. The three externally-hanging ring segments are spliced, clamped and compressed through the seam allowance positioning fixture, and meanwhile, the problems of poor rigidity and serious deformation of parts when the externally-hanging ring segments are independently processed are solved by combining a positioning welding mode.
Description
Technical Field
The invention relates to the technical field of machining of parts of low-pressure turbine guides of aircraft engines, in particular to a method for machining a clamping groove of an externally-hung ring segment.
Background
The external hanging ring belongs to an important part of a low-pressure turbine guider of an aircraft engine and consists of three external hanging ring sections. A plurality of clamping teeth are arranged on each externally hanging ring section, and each clamping tooth is provided with a radial clamping groove. When the three externally-hanging ring sections form the externally-hanging ring, the groove width of each clamping groove is required to be consistent.
If the clamping groove on the external hanging ring segment is separately machined, because parts are thin, the thinnest part is only 1.5mm, the rigidity is poor, the vibration cutter is serious in the machining process, the clamping groove is machined according to the traditional mode that the external hanging ring segment is separately machined, the machining precision requirement cannot be met, and meanwhile, the machined external hanging ring segment is seriously deformed due to the poor rigidity of the parts; in addition, the width consistency of the clamping groove of the external hanging ring formed by assembling the three external hanging ring segments is poor by adopting a traditional mode of independently processing the external hanging ring segments.
Disclosure of Invention
The invention mainly aims to provide a method for machining a clamping groove of an externally-hung ring segment, and aims to solve the technical problem.
In order to achieve the purpose, the invention provides a method for processing a clamping groove of an externally hanging ring segment, which comprises the following steps:
step S1: clamping and positioning a workpiece: splicing the three external ring segments into a ring shape, installing the ring segments on a spigot positioning fixture and pressing the ring segments tightly;
step S2: positioning welding: positioning welding is carried out on the connecting position between two adjacent external hanging ring sections;
step S3: numerical control turning: turning clamping grooves in clamping blocks on the three external hanging ring segments after welding by using a numerical control vertical lathe;
step S4: polishing spot weld beading: after turning is finished, polishing the weld beading of the tack welding under the clamping and compressing state, so that the surface has no obvious welding trace;
step S5: and loosening the seam allowance positioning fixture, taking the three external ring segments out of the seam allowance positioning fixture, and separating the three external ring segments from the welding part to obtain the three external ring segments for finishing the processing of the clamping groove.
Preferably, in step S1, the spigot positioning jig includes an annular base, a plurality of pressing plates, and a plurality of supporting blocks; a stepped through hole is formed in the center of the annular base; the three externally-hung ring segments are arranged on the stepped through hole of the annular base; one end of the pressure plate presses the external hanging ring section, and the other end of the pressure plate is supported on the upper surface of the supporting block; the pressure plate is pressed tightly with the annular base through the screw.
Preferably, the pressure plate presses the upper surfaces of the fixture blocks on the externally hanging ring segments, and each fixture block is provided with the pressure plate for compressing.
Preferably, in step S2, the welding wire material used for tack welding is the same as the material of the external hanging ring segment.
Preferably, in step S2, the welding wire material used for tack welding is HGH 4648.
Preferably, in step S2, the diameter of the welding wire used for tack welding is phi 1.0mm, and the diameter of the tungsten grade used for tack welding is phi 1.6 mm; the welding current is 30-60A, and the welding speed is 0.1 m/min.
Preferably, in step S2, after the tack welding operation is completed, the welding material is naturally cooled for a cooling time of 2h or more.
Preferably, in step S3, when performing numerical control turning, a cutter with a width of 2mm and a tip angle r0.2mm is selected.
Preferably, in step S3, when performing numerical control turning, the tool path includes a radial vertical cut, a radial upper cut, and a radial lower cut; the feeding direction of the radial vertical cutting is along the radial direction of the clamping groove; the radially upcut feed direction is: firstly, feeding along the lower side surface of the clamping groove, then upwards, and then withdrawing along the upper side surface of the clamping groove; the feed direction of the radial undercutting is as follows: firstly, feeding along the upper side surface of the clamping groove, then downwards, and then withdrawing along the lower side surface of the clamping groove;
the cutting parameters of the radial vertical cutting are as follows: the rotating speed S is 8-10r/min, the feeding F is 0.05-0.06mm/min, and the cutting depth is 0.3-0.4 mm;
the cutting parameters of the radial up-cutting are as follows: the rotating speed S is 10-15r/min, the feeding F is 0.06-0.08mm/min, and the cutting depth is 0.1-0.2 mm;
the cutting parameters of the radial undercut are as follows: the rotating speed S is 15-20r/min, the feeding F is 0.08-0.1mm/min, and the cutting depth is 0.2 mm.
The invention has the following beneficial effects:
(1) the invention adopts the splicing of the three externally-hanging ring segments, clamps and compresses the three externally-hanging ring segments through the rabbet positioning fixture, and simultaneously overcomes the problems of poor rigidity and serious deformation of parts when the externally-hanging ring segments are separately processed by combining a positioning welding mode. In addition, the splicing mode is adopted for processing, and the groove width consistency of each clamping groove on the externally-hung ring assembly formed by finally assembling the three externally-hung ring segments is good.
(2) The three externally-hanging ring segments are spliced and clamped in the fixture for pressing for processing, the processing of the clamping grooves on the three externally-hanging ring segments can be finished by one-time processing, and the processing efficiency is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic perspective view of an external hanging ring segment according to the present invention;
FIG. 2 is a front view of an external hanging ring segment of the present invention;
FIG. 3 is a schematic perspective view of the spigot positioning fixture of the present invention;
FIG. 4 is a top view of the spigot positioning fixture of the invention;
FIG. 5 is a cross-sectional view taken along A-A of FIG. 4;
FIG. 6 is a schematic view of the positions of tack welds of three externally-hanging ring segments according to the present invention;
FIG. 7 is a schematic view of a radial vertical cutter rail according to the present invention;
FIG. 8 is a schematic view of a radially upper cutter rail of the present invention;
FIG. 9 is a schematic view of a radial lower cutter path of the present invention;
the reference numbers illustrate: 10-external hanging ring section; 101-a fixture block; 102-card slot; 20-spigot positioning fixture; 201-ring-shaped base; 202-a platen; 203-a support block; 204-screw.
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.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
As shown in fig. 1 and 2, which are schematic structural diagrams of the external hanging ring segment 10 of the present invention, a plurality of clamping blocks 101 are uniformly distributed on the external hanging ring 10, clamping grooves 102 are arranged in the clamping blocks 101, the progress of the groove width of the clamping grooves 102 is required to be ± 0.05mm, when the external hanging ring is installed on a low-pressure turbine guider of an aircraft engine, three external hanging ring segments 10 are spliced to form an integral external hanging ring, and the formed integral external hanging ring requires that the groove width, the groove depth and the axial position of each clamping groove 102 are consistent.
A processing method of a clamping groove of an externally hung ring segment comprises the following steps:
step S1: clamping and positioning a workpiece: splicing the three external ring segments 10 into a ring shape, installing the ring shape on a spigot positioning clamp 20 and pressing the ring shape;
step S2: positioning welding: positioning welding is carried out on the connecting position between two adjacent external hanging ring sections 10, and the welding point position is shown as E, F, G in FIG. 6;
step S3: numerical control turning: turning clamping grooves 102 in clamping blocks 101 on the three external hanging ring segments 10 after welding by using a numerical control vertical lathe;
step S4: polishing spot weld beading: after turning is finished, polishing the weld beading of the tack welding under the clamping and compressing state, so that the surface has no obvious welding trace;
step S5: and (3) loosening the seam allowance positioning fixture 20, taking the three external ring sections 10 out of the seam allowance positioning fixture 20, and separating the three external ring sections 10 from the welding part to obtain the three external ring sections 10 for finishing the processing of the clamping groove 101.
In the present embodiment, as shown in fig. 3, 4 and 5, in step S1, the spigot positioning jig 20 includes an annular base 201, a plurality of pressing plates 202, and a plurality of supporting blocks 203; a stepped through hole is formed in the center of the annular base 201; the three externally hanging ring segments 10 are arranged on the stepped through holes of the annular base 201; specifically, the stepped through hole at the center of the annular base 201 is composed of holes with the hole diameters phi C and phi D, and the phi C and phi D through holes form spigots which are respectively matched with the excircle of the large end phi a and the excircle of the small section phi B of the externally hanging ring segment 10, so as to play roles of centering and axial positioning on the externally hanging ring segment 10.
In this embodiment, as shown in fig. 3, one end of the pressure plate 202 presses the external hanging ring segment 10, and the other end is supported on the upper surface of the supporting block 203; the pressure plate 202 is connected and pressed to the ring base 201 by screws 204. Further, the pressure plate 202 presses the upper surface of the fixture block 101 of the external hanging ring segment 10, and a pressure plate 202 is disposed on each fixture block 101 for pressing. By pressing the pressing plate 202 against the upper surface of the latch 101, deformation due to a thin wall thickness of the upper side of the latch 102 during processing of the latch 102 can be avoided.
In the present embodiment, in step S2, the welding wire material used for tack welding is the same as the material of the external hanging ring segment 10. Specifically, the welding wire material adopted by the tack welding is HGH4648, the diameter of the welding wire is phi 1.0mm, and the diameter of the adopted tungsten grade is phi 1.6 mm; the welding current is 30-60A, and the welding speed is 0.1 m/min. By selecting tungsten grade with the diameter of phi 1.0mm and the diameter of phi 1.6mm and controlling the welding current and the welding speed, small weld beading can be formed, and the weld beading can be cleaned and polished conveniently in the subsequent procedures.
In this embodiment, in step S2, after the tack welding operation is completed, the welding material is naturally cooled for a cooling time of not less than 2 hours, and the welding stress can be effectively released by sufficient cooling.
In this embodiment, as shown in fig. 7 to 9, in step S3, when performing numerical control turning, a cutter with a width of 2mm and a tip angle r0.2mm is selected, and when performing numerical control turning, the tool path includes a radial vertical cut, a radial upper cut, and a radial lower cut;
the feeding direction of the radial vertical cut is along the radial direction of the clamping groove 102; the radial vertical cutting method is mainly used for removing the allowance, so that the allowance is left by 0.2 mm;
the radially upcut feed direction is: feeding along the lower side of the card slot 102, then upward, and then retracting along the upper side of the card slot 102; the radial cutting method mainly has the advantages that the groove width dimension is processed in place;
the feed direction of the radial undercutting is as follows: firstly, the feed is carried out along the upper side surface of the clamping groove 102, then the feed is carried out downwards, and then the feed is withdrawn along the lower side surface of the clamping groove 102, and the radial downward cutting method mainly has the advantages that the groove depth dimension is processed in place, and the root of the processed groove is ensured not to have an obvious tool receiving platform.
The cutting parameters of the radial vertical cutting, the radial upper cutting and the radial lower cutting are respectively as follows:
the cutting parameters of the radial vertical cut were: the rotating speed S is 8-10r/min, the feeding F is 0.05-0.06mm/min, and the cutting depth is 0.3-0.4 mm;
the cutting parameters of the radial up-cut are: the rotating speed S is 10-15r/min, the feeding F is 0.06-0.08mm/min, and the cutting depth is 0.1-0.2 mm;
the cutting parameters of the radial undercut are: the rotating speed S is 15-20r/min, the feeding F is 0.08-0.1mm/min, and the cutting depth is 0.2 mm.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A processing method of a slot of an externally hung ring segment is characterized by comprising the following steps:
step S1: clamping and positioning a workpiece: splicing the three external ring segments (10) into a ring shape, installing the ring segments on a spigot positioning clamp (20) and pressing the ring segments tightly;
step S2: positioning welding: positioning welding is carried out on the connecting position between two adjacent external hanging ring sections (10);
step S3: numerical control turning: turning clamping grooves (102) in clamping blocks (101) on the three external hanging ring segments (10) after welding by using a numerical control vertical lathe;
step S4: polishing spot weld beading: after turning is finished, polishing the weld beading of the tack welding under the clamping and compressing state, so that the surface has no obvious welding trace;
step S5: and (3) loosening the seam allowance positioning fixture (20), taking the three external ring sections (10) out of the seam allowance positioning fixture (20), and separating the three external ring sections from the welding part to obtain the three external ring sections (10) for finishing the processing of the clamping groove (101).
2. The method for processing the clamping groove of the externally hanging ring segment as claimed in claim 1, wherein: in step S1, the spigot positioning jig (20) includes an annular base (201), a plurality of pressure plates (202), and a plurality of support blocks (203); a step-shaped through hole is formed in the center of the annular base (201);
the three externally hanging ring segments (10) are arranged on the stepped through hole of the annular base (201); one end of the pressure plate (202) presses the external hanging ring section (10), and the other end of the pressure plate is supported on the upper surface of the supporting block (203); the pressure plate (202) is connected with the annular base (201) through a screw (204) and is pressed tightly.
3. The method for processing the clamping groove of the externally hanging ring segment as claimed in claim 2, wherein: the pressing plate (202) presses the upper surface of a fixture block (101) on the externally-hung ring segment (10), and the pressing plate (202) is arranged on each fixture block (101) for pressing.
4. The method for processing the clamping groove of the externally hanging ring segment as claimed in claim 1, wherein: in step S2, the welding wire material adopted by the tack welding is the same as the material of the external hanging ring segment (10).
5. The method for processing the slot of the externally hanging ring segment as claimed in claim 4, wherein: in step S2, the wire material used for tack welding is HGH 4648.
6. The method for processing the clamping groove of the externally hanging ring segment as claimed in claim 1, wherein: in step S2, the diameter of the wire used for tack welding is phi 1.0mm, and the diameter of the tungsten grade used is phi 1.6 mm; the welding current is 30-60A, and the welding speed is 0.1 m/min.
7. The method for processing the clamping groove of the externally hanging ring segment as claimed in claim 1, wherein: in step S2, after the tack welding operation is completed, the welding material is naturally cooled for a cooling time of not less than 2 h.
8. The method for processing the clamping groove of the externally hanging ring segment as claimed in claim 1, wherein: in step S3, when performing numerical control turning, a cutter with a width of 2mm and a tip angle r0.2mm is selected.
9. The method for processing the slot of the externally hanging ring segment as claimed in claim 8, wherein: in step S3, when performing numerical control turning, the tool path includes a radial vertical cut, a radial upper cut, and a radial lower cut;
the feeding direction of the radial vertical cutting is along the radial direction of the clamping groove (102);
the radially upcut feed direction is: firstly, feeding along the lower side surface of the clamping groove (102), then upwards, and then withdrawing along the upper side surface of the clamping groove (102);
the feed direction of the radial undercutting is as follows: the card slot is fed along the upper side of the card slot (102) first, then down, and then retracted along the lower side of the card slot (102).
10. The method for processing the slot of the externally hanging ring segment as claimed in claim 9, wherein:
the cutting parameters of the radial vertical cutting are as follows: the rotating speed S is 8-10r/min, the feeding F is 0.05-0.06mm/min, and the cutting depth is 0.3-0.4 mm;
the cutting parameters of the radial up-cutting are as follows: the rotating speed S is 10-15r/min, the feeding F is 0.06-0.08mm/min, and the cutting depth is 0.1-0.2 mm;
the cutting parameters of the radial undercut are as follows: the rotating speed S is 15-20r/min, the feeding F is 0.08-0.1mm/min, and the cutting depth is 0.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111333349.3A CN113977201B (en) | 2021-11-11 | 2021-11-11 | Processing method of externally hung ring segment clamping groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111333349.3A CN113977201B (en) | 2021-11-11 | 2021-11-11 | Processing method of externally hung ring segment clamping groove |
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| Publication Number | Publication Date |
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| CN113977201A true CN113977201A (en) | 2022-01-28 |
| CN113977201B CN113977201B (en) | 2024-07-09 |
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| CN202111333349.3A Active CN113977201B (en) | 2021-11-11 | 2021-11-11 | Processing method of externally hung ring segment clamping groove |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3056427A1 (en) * | 2016-09-27 | 2018-03-30 | Safran Aircraft Engines | PROCESS FOR TURBINE MACHINING BY TURBOMACHINE |
| CN108526937A (en) * | 2018-03-20 | 2018-09-14 | 哈尔滨汽轮机厂有限责任公司 | A kind of method for turning of machining piston ring special fixture and machining piston ring |
| CN109773391A (en) * | 2019-02-19 | 2019-05-21 | 国家电网有限公司 | A kind of shading ring and inserts positioning tool for welding |
| CN110814653A (en) * | 2019-11-15 | 2020-02-21 | 哈尔滨电气动力装备有限公司 | Processing technology of snap ring for asynchronous motor |
| CN111805173A (en) * | 2020-06-16 | 2020-10-23 | 中铁工程装备集团隧道设备制造有限公司 | Combined machining process for shield edge scraper 45-degree die forging blank |
-
2021
- 2021-11-11 CN CN202111333349.3A patent/CN113977201B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3056427A1 (en) * | 2016-09-27 | 2018-03-30 | Safran Aircraft Engines | PROCESS FOR TURBINE MACHINING BY TURBOMACHINE |
| CN108526937A (en) * | 2018-03-20 | 2018-09-14 | 哈尔滨汽轮机厂有限责任公司 | A kind of method for turning of machining piston ring special fixture and machining piston ring |
| CN109773391A (en) * | 2019-02-19 | 2019-05-21 | 国家电网有限公司 | A kind of shading ring and inserts positioning tool for welding |
| CN110814653A (en) * | 2019-11-15 | 2020-02-21 | 哈尔滨电气动力装备有限公司 | Processing technology of snap ring for asynchronous motor |
| CN111805173A (en) * | 2020-06-16 | 2020-10-23 | 中铁工程装备集团隧道设备制造有限公司 | Combined machining process for shield edge scraper 45-degree die forging blank |
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| CN113977201B (en) | 2024-07-09 |
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