CN113967857B - Machining method for deformation repair of turbine front sealing disc - Google Patents
Machining method for deformation repair of turbine front sealing disc Download PDFInfo
- Publication number
- CN113967857B CN113967857B CN202111245476.8A CN202111245476A CN113967857B CN 113967857 B CN113967857 B CN 113967857B CN 202111245476 A CN202111245476 A CN 202111245476A CN 113967857 B CN113967857 B CN 113967857B
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- Prior art keywords
- grinding
- clamping
- face
- grinding wheel
- turbine front
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/12—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
- B24B53/062—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels using rotary dressing tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
- B24B53/075—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms
Abstract
The invention discloses a processing method for deformation repair of a turbine front sealing disc, which is characterized in that a clamping-free deformation clamp is designed, a grinding wheel with a special shape is customized, the processing precision can be improved only by milling a groove, the clamp comprises a tensioning sleeve with a tensioning function and a bolt, the lower end surface of the grinding wheel is parallel to an inner hole of a part, and the slope of a surface B is larger than that of the inclined surface; the length of the working surface of the lower end surface is smaller than that of the surface to be processed, and the invention has the advantages that: through making reasonable reprocessing scheme, guarantee behind the turbine front seal dish installation limit front and back terminal surface restoration that surpasses the internal control standard behind the test run, size and technical condition satisfy the design requirement.
Description
Technical Field
The technical field of aero-engines, in particular to a processing method for deformation repair of a turbine front sealing disc.
Background
The turbine front sealing disc is arranged at the front end of the high-pressure turbine disc, and is assembled with the high-pressure turbine front shaft and the high-pressure turbine disc through bolts, the parts are key parts of an internal flow air system of the engine and are used for collecting high-pressure cold air from a nine-stage disc of the high-pressure compressor, and the high-pressure cold air is guided into the high-pressure turbine disc mortises and the high-pressure turbine blades through the turbine disc groove bottom air guide grooves, so that the effects of cooling the high-pressure turbine disc webs, rims, high-pressure turbine blade tenons and blade bodies are achieved.
The high-temperature alloy part of the sealing disc before the turbine is subjected to deformation of different degrees on the front end face and the rear end face of the mounting flange after the part is subjected to trial run, the flatness of the matched end face after the part is required to be repaired is required to be 0.01mm, the runout is required to be 0.01mm, the parallelism of the end face of the other side opposite to the end face is required to be 0.02mm, the precision requirement is very high for the weak-rigidity part, the part needing to be repaired is the bottom face of an end face groove of the front end face and the rear end face of the mounting edge, the machining part is relatively closed, the cutter receiving position and the size are required to be strict, and the part repairing difficulty is high
Disclosure of Invention
In order to solve the problems, the invention discloses a processing method for deformation repair of a turbine front sealing disc.
The specific technical scheme is as follows:
a processing method for deformation repair of a turbine front sealing disc comprises the following steps:
(1) Designing a clamping-free deformation clamp, wherein the appearance of the clamping-free deformation clamp is in contact and clamping with the front end face and the rear end face of the turbine front sealing disc, the clamping-free deformation clamp is in a flange shape, a positioning hole for clamping and positioning is formed in the contact surface of the clamping-free deformation clamp and the turbine front sealing disc, the hole site of the turbine front sealing disc is placed corresponding to the positioning hole, and then the clamping-free deformation clamp is placed in the positioning hole through an expansion sleeve assembly, and the expansion sleeve assembly comprises an expansion sleeve and a bolt; the clamping-free deformation clamp takes the end face to be processed of the part as a supporting reference, the supporting plane is subjected to grinding processing, flatness is guaranteed, free fitting with the end face of the part is facilitated during clamping, the end face of the clamp corresponds to a threaded hole in the position of a connecting hole of the part, the part is placed on the end face of the clamp in a free state, the inner wall surface of the positioning hole is expanded by using a slotted expansion sleeve assembly, the part is fastened on the end face of the clamp in an approximate free state, and the effect of self-centering of turning is achieved by using the position precision of the hole on the part;
(2) Customizing a dish-shaped white corundum grinding wheel with a non-standard shape, customizing the grinding wheel after three-dimensional interference calculation, and finishing the grinding wheel into a precise shape through a diamond roller; the part is required to be repaired at the bottom of the end face groove, the machining part is relatively closed, and the position of the transfer fillet is not allowed to be connected with a cutter when the end face is corrected by grinding, so that a dished 80# white corundum abrasive grinding wheel with a non-standard shape is required to be customized; the lower end face of the disc-shaped white corundum grinding wheel is a working plane, a surface A is parallel to an inner hole of a part, a surface B is used for avoiding an inclined plane on one side of a surface to be processed, and the inclined plane of the surface B is larger than that of the inclined plane; the length of the working surface of the lower end surface of the disc-shaped white corundum grinding wheel is smaller than that of the surface to be processed.
The special diamond roller is designed and manufactured to accurately trim the shape of the grinding wheel, the accurate shape of the grinding wheel can be achieved without grinding a blank and a hub fillet when the matched end face is ground, the periodic trimming of the shape of the grinding wheel is achieved, and the shape of the disc-shaped grinding wheel is ensured to be fixed;
(3) The end face grinding test adopts a mode of cutting into a cutter for grinding, reciprocally feeding and grinding a reference plane, and controls the once-through program circulation grinding amount to be within 0.01mm through a micrometer range finder, thereby realizing the requirements of reference two-face grinding, the size after the grinding and various technical conditions;
(4) Checking whether the related size and form tolerance meet the size and form tolerance requirements of the design drawing or not through a three-coordinate measuring machine and a stacked projection detection system; if not, repeating the steps (1) and (3).
When the micrometer range finder detects that the single-cycle grinding amount is larger than 0.02mm, the program cycle grinding amount generates error reporting, so that the grinding work is interrupted.
The invention has the advantages that: according to the technical scheme designed by the invention, the end face repairing processing of a plurality of parts is finished at present, all the dimensions and technical conditions meet the design requirements, the repairing process is stable, the technical scheme can be applied to the end face grinding processing of turbine front sealing discs, comb tooth discs and the like with similar structures, and the part deformation caused by clamping force is basically eliminated by adopting a clamping-free deformation clamp.
Drawings
FIG. 1 is a schematic diagram of the outline structure of a turbine front seal disc where machining is required;
FIG. 2 is a schematic structural view of a non-clamping deformation clamp;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a schematic view of the grinding wheel processing shape and structure.
Detailed Description
The front and rear end surfaces of the mounting edge of the turbine front sealing disc after test run are deformed, the flatness of the matched end surface after repair is required to be 0.01mm, the runout is required to be 0.01mm, the parallelism of the end surface of the other side opposite to the end surface is required to be 0.02mm, the part structure is shown in figure 1, and a thick line mark in the figure 1 is a part needing repair.
The invention is specifically described below with reference to the accompanying drawings, as shown in the drawings, a processing method for deformation repair of a turbine front sealing disc comprises the following steps:
(1) Designing a clamping-free deformation clamp, wherein the appearance of the clamping-free deformation clamp is in contact clamping with the front end face and the rear end face of the turbine front sealing disc, the clamping-free deformation clamp is flange-shaped, a positioning hole 1 for clamping and positioning is formed in the contact surface of the clamping-free deformation clamp and the turbine front sealing disc, a hole site of the turbine front sealing disc is placed corresponding to the positioning hole, and then the clamping-free deformation clamp is placed in the positioning hole through an expansion sleeve assembly 2, and the expansion sleeve assembly comprises an expansion sleeve 21 and a bolt 22; the clamping-free deformation clamp takes the end face to be processed of the part as a supporting reference, the supporting plane is subjected to grinding processing, flatness is guaranteed, free fitting with the end face of the part is facilitated during clamping, the end face of the clamp corresponds to a threaded hole in the position of a connecting hole of the part, the part is placed on the end face of the clamp in a free state, the inner wall surface of the positioning hole is expanded by using a slotted expansion sleeve assembly, the part is fastened on the end face of the clamp in an approximate free state, and the effect of self-centering of turning is achieved by using the position precision of the hole on the part;
(2) Customizing a non-standard-shaped disc-shaped white corundum grinding wheel 3, customizing the grinding wheel after three-dimensional interference calculation, and finishing the grinding wheel into a precise shape through a diamond roller; the part is required to be reworked, the bottom surface of the end surface groove is relatively closed in processing part, and the position of the transfer fillet is not allowed to be connected with a cutter when the end surface is corrected by grinding, so that a dished 80# white corundum abrasive grinding wheel with a non-standard shape is required to be customized, and the grinding wheel can safely enter the end surface groove without interference to finish reciprocating feeding and grinding the bottom surface when the surface is ground; the lower end face of the disc-shaped white corundum grinding wheel is a working plane, as shown in fig. 4, a surface A is parallel to an inner hole 41 of a part, and a surface B is larger than a slope of an inclined plane 42 on one side of a surface to be processed in order to avoid the inclined plane; the working surface length of the lower end surface of the disc-shaped white corundum grinding wheel is smaller than the length of the surface to be processed 4.
The special diamond roller is designed and manufactured to accurately trim the shape of the grinding wheel, the accurate shape of the grinding wheel can be achieved without grinding a blank and a hub fillet when the matched end face is ground, the periodic trimming of the shape of the grinding wheel is achieved, and the shape of the disc-shaped grinding wheel is ensured to be fixed;
(3) The end face grinding test adopts a mode of cutting into a cutter for grinding, reciprocally feeding and grinding a reference plane, and controls the once-through program circulation grinding amount to be within 0.01mm through a micrometer range finder, thereby realizing the requirements of reference two-face grinding, the size after the grinding and various technical conditions;
(4) Checking whether the related size and form tolerance meet the size and form tolerance requirements of the design drawing or not through a three-coordinate measuring machine and a stacked projection detection system; if not, repeating the steps (1) and (3).
When the micrometer range finder detects that the single-cycle grinding amount is larger than 0.02mm, the program cycle grinding amount generates error reporting, so that the grinding work is interrupted.
Claims (2)
1. The processing method for repairing the deformation of the turbine front sealing disc is characterized by comprising the following steps of:
(1) Designing a clamping-free deformation clamp, wherein the appearance of the clamping-free deformation clamp is in contact and clamping with the front end face and the rear end face of the turbine front sealing disc, the clamping-free deformation clamp is in a flange shape, a positioning hole for clamping and positioning is formed in the contact surface of the clamping-free deformation clamp and the turbine front sealing disc, the hole site of the turbine front sealing disc is placed corresponding to the positioning hole, and then the clamping-free deformation clamp is placed in the positioning hole through an expansion sleeve assembly, and the expansion sleeve assembly comprises an expansion sleeve and a bolt;
(2) Customizing a dish-shaped white corundum grinding wheel with a non-standard shape, customizing the grinding wheel after three-dimensional interference calculation, and finishing the grinding wheel into a precise shape through a diamond roller; the lower end face of the disc-shaped white corundum grinding wheel is a working plane, a surface A is parallel to an inner hole of a part, a surface B is used for avoiding an inclined plane on one side of a surface to be processed, and the inclined plane of the surface B is larger than that of the inclined plane; the length of the working surface of the lower end surface of the disc-shaped white corundum grinding wheel is smaller than that of the surface to be processed;
(3) The end face grinding test adopts a mode of cutting into an end face by a grinding cutter, and reciprocally feeding a grinding reference plane, and the one-time program circulation grinding amount is controlled within 0.01mm by a micrometer range finder, so that the requirements of reference two-face grinding processing, the size after processing and various technical conditions are realized;
(4) Checking whether the related size and form tolerance meet the size and form tolerance requirements of the design drawing or not through a three-coordinate measuring machine and a stacked projection detection system; if not, repeating the steps (1) and (3).
2. The method for processing the deformation repair of the turbine front seal disc according to claim 1, wherein the method comprises the following steps: when the micrometer range finder detects that the single-cycle grinding amount is larger than 0.02mm, the program cycle grinding amount generates error reporting, so that the grinding work is interrupted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111245476.8A CN113967857B (en) | 2021-10-26 | 2021-10-26 | Machining method for deformation repair of turbine front sealing disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111245476.8A CN113967857B (en) | 2021-10-26 | 2021-10-26 | Machining method for deformation repair of turbine front sealing disc |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113967857A CN113967857A (en) | 2022-01-25 |
| CN113967857B true CN113967857B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111245476.8A Active CN113967857B (en) | 2021-10-26 | 2021-10-26 | Machining method for deformation repair of turbine front sealing disc |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115431069B (en) * | 2022-10-10 | 2024-01-12 | 中国航发沈阳黎明航空发动机有限责任公司 | Precision machining tool and method for front and rear mounting planes of weak-rigidity large-scale sealing disc piece |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11262845A (en) * | 1998-03-17 | 1999-09-28 | Toyo Advanced Technologies Co Ltd | Inner face grinding method |
| CN203050799U (en) * | 2012-12-05 | 2013-07-10 | 中航商用航空发动机有限责任公司 | High-pressure turbine rotor assembling component |
| CN107457615A (en) * | 2017-09-04 | 2017-12-12 | 中国航发南方工业有限公司 | The grinding processing method of turbo blade step surface |
| CN107598497A (en) * | 2017-10-18 | 2018-01-19 | 无锡航亚盘件制造有限公司 | The processing method that a kind of aero-engine obturages labyrinth |
| CN110497250A (en) * | 2019-06-14 | 2019-11-26 | 成都和鸿科技有限公司 | A kind of processing method of small-sized combustion engine turbine guide vane circular arc and end face |
-
2021
- 2021-10-26 CN CN202111245476.8A patent/CN113967857B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11262845A (en) * | 1998-03-17 | 1999-09-28 | Toyo Advanced Technologies Co Ltd | Inner face grinding method |
| CN203050799U (en) * | 2012-12-05 | 2013-07-10 | 中航商用航空发动机有限责任公司 | High-pressure turbine rotor assembling component |
| CN107457615A (en) * | 2017-09-04 | 2017-12-12 | 中国航发南方工业有限公司 | The grinding processing method of turbo blade step surface |
| CN107598497A (en) * | 2017-10-18 | 2018-01-19 | 无锡航亚盘件制造有限公司 | The processing method that a kind of aero-engine obturages labyrinth |
| CN110497250A (en) * | 2019-06-14 | 2019-11-26 | 成都和鸿科技有限公司 | A kind of processing method of small-sized combustion engine turbine guide vane circular arc and end face |
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| Publication number | Publication date |
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| CN113967857A (en) | 2022-01-25 |
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