CN116984847A - Machining method for deep groove of compressor disc hub - Google Patents
Machining method for deep groove of compressor disc hub Download PDFInfo
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- CN116984847A CN116984847A CN202311254607.8A CN202311254607A CN116984847A CN 116984847 A CN116984847 A CN 116984847A CN 202311254607 A CN202311254607 A CN 202311254607A CN 116984847 A CN116984847 A CN 116984847A
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- 238000003754 machining Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 38
- 238000003672 processing method Methods 0.000 claims abstract description 9
- 238000012795 verification Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 5
- 230000006641 stabilisation Effects 0.000 claims description 5
- 238000011105 stabilization Methods 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013021 overheating Methods 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
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/02—Machine tools for performing different machining operations
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Abstract
The invention belongs to the technical field of aero-engines, and particularly relates to a processing method for a deep groove of a compressor disc hub. The difficult problem of hub deep groove processing is solved through the establishment of a process route, the establishment of hub deep groove rough machining allowance, the design of a hub deep groove rough machining clamping mode, the numerical control machining of the hub deep groove and the measurement of the hub deep groove.
Description
Technical Field
The invention belongs to the technical field of aero-engines, and particularly relates to a processing method for a deep groove of a compressor disc hub.
Background
The deep groove of the hub is a structure on a disc part of a compressor in an engine, the structure of the deep groove of the hub is complex, the deep groove is arranged on one side of a disc radial plate, a notch is wide and the groove bottom is narrow, the deep groove is of an inverted U-shaped structure, the size of the notch is 10mm, the width of the groove is 8mm, the groove bottom is an arc of R4, and the outer side of the groove is a thin wall with the wall thickness of only 2.5 mm. The deep groove of the hub is made of high-temperature alloy and is formed by turning a numerical control lathe. The complex structure combined with difficult to machine materials makes the hub deep groove difficult to machine. During processing, factors such as cutter striking, chip removal difficulty, cutter yielding, vibration and the like can appear, so that the size of the deep groove of the hub is not easy to ensure. The hub deep groove is a bottleneck in the processing of compressor disc parts, and the hub deep groove has a large number of sizes, and the main sizes are the groove width on a fixed intercept and the wall thickness outside the groove because the hub deep groove is composed of an inclined surface and a round angle. Because of the specificity of the deep groove structure of the hub, the universal measuring tool cannot be used for measurement in the process of machining, and special measuring tools and standard parts are required to be designed for measurement. The hub deep groove has thin wall thickness and is easy to deform during processing, so that the hub deep groove processing has very high requirements on numerical control processing methods and processing parameters.
Disclosure of Invention
In order to solve the problems, the invention provides a processing method for a deep groove of a compressor disc hub, which solves the problems of large processing difficulty and difficult guarantee of the size of the deep groove of the hub and improves the processing efficiency of the deep groove of the hub from the aspects of making a process route, making a rough processing allowance of the deep groove of the hub, designing a rough processing clamping mode of the deep groove of the hub, numerical control processing of the deep groove of the hub and measuring the deep groove of the hub. The technical scheme of the invention is as follows:
a processing method for a deep groove of a compressor disc hub comprises the following steps:
step 1, carrying out a rough turning process of a hub: sequentially carrying out rough turning on a first surface of the hub and a second surface of the hub, wherein the allowance left on each surface of the hub is 1.5mm after rough turning is finished; the allowance of the deep groove of the hub is divided into radial allowance and axial allowance, wherein the radial allowance is the depth of a groove of the deep groove of the hub, the smallest allowance of the groove bottom is not less than 1.5mm, the axial allowance is the rough turning width of the deep groove of the hub, the width is 4.2-4.4 mm, when in machining, a groove cutter with the width of 4mm is used for machining, when in machining, the groove cutter is used for machining, the chip removal and the full cooling of the cutter when the deep groove of the hub is turned are ensured, and the cutting depth is less than 1mm;
the rough turning processing technology aims at removing most of the allowance of the parts, reserving uniform allowance for finish turning processing as much as possible, and then performing stabilization treatment to eliminate the processing stress in the compressor disc; the spoke plate of the compressor disc is thinner, if the hub deep groove is roughly grooved during rough turning, the machining stress is larger, the spoke plate of the compressor disc can be easily deformed due to the rough grooving of the hub deep groove, and therefore the size of a part spoke plate is not easy to ensure, and the establishment of the rough turning allowance of the hub deep groove is crucial to the quality of the compressor disc;
step 2, placing the hub after rough turning into a furnace for heating, and performing stabilization treatment to eliminate the machining stress in the compressor disc;
step 3, performing a first surface turning reference process and a second surface turning reference process;
and 4, carrying out a finish turning processing technology of the hub: carrying out finish turning wheel hub first face external diameter, finish turning wheel hub second face external diameter, finish turning wheel hub first face and finish turning wheel hub second face in proper order, wherein, finish turning wheel hub second face includes following steps:
step 4.1, selecting a cutter, aligning the cutter and verifying the position of the cutter: the deep groove of the hub belongs to an end surface groove, the groove depth is 30mm, and the diameters of the upper and lower inner walls of the groove are smaller, so that a cutter bar of the cutter is provided with a double relief angle structure, the initial cutting radius value of the double relief angle structure is in the range of the radius values of the upper and lower inner walls of the deep groove of the hub, otherwise, a turning tool collides with the upper and lower walls of the groove and cannot be turned;
step 4.2, removing the allowance left on each surface of the hub during rough turning processing in the step 1, and processing the hub to a final surface;
step 4.3, rough machining: during rough machining, when the blade is turned to the bottom of the groove, turning parameters are paid attention to, specifically, the rotating speed and the feeding are reduced, the rotating speed is ensured to be 10-20 r/min, and the feeding is ensured to be 0.1mm/r; when a rough machining feeding route is designed, the cutter is retracted after cutting for 2-4 mm, so that the cutter is safely retracted and far away from the part, on one hand, chips in the deep groove can be discharged, and on the other hand, the overheating blade can be fully cooled;
step 4.4, finish machining: before finishing, verifying whether the hub moves and aligns the position, when finishing the hub deep groove, cutting into a cutter in an arc manner above the end face of the hub on the second face, paying attention to abrasion of a cutter and row cutting of cutting, measuring the radial size and the groove width size of the hub deep groove after cutting, and if the size is unqualified, finishing again until the size is qualified.
Furthermore, in order to ensure the quality of finish turning machining of the compressor disc, a special fixture is required to be applied during rough machining of the hub deep groove, and if the hub is suspended and clamped, the cutter and the part can generate larger vibration during machining, so that the cutter is worn out in an accelerating way, and the part generates larger vibration patterns. The stress is released during finish turning of the compressor disc, deformation is generated, and the machining quality is affected, so that the clamping mode during deep groove rough turning of the hub in the step 1 is as follows: the hub end face and the hub inner hole of the first surface are used as clamping references for clamping, so that vibration of the hub and the cutter is reduced, the cutting force of machining is counteracted, and deformation of the compressor disc during polishing is avoided.
Further, the method for processing the deep groove of the compressor disc hub comprises the following step 4.1: roughing selects a groove blade with the width R of 5mm and the width R of 0.8; the finishing selects a slot blade of 5mm width R0.8 and a ball blade of R2.5.
Further, the method for processing the deep groove of the compressor disc hub specifically comprises the following step 4.1 of cutter setting and cutter position verification: the center of the R near the inner hole of the compressor disk is selected as the origin of programming of the cutter center, and when the positions of the cutter and the cutter are verified, the center of the R is ensured to be consistent with the center of the R during programming, so that the position error of the cutter is prevented.
Furthermore, in the processing method for the deep groove of the hub of the compressor disc, in the step 4.4, the finishing allowance of the deep groove of the hub is uneven, and in the processing, a groove blade with the width of 5mm and the width of R0.8 is selected to remove the allowance, so that each surface in the groove is left with the allowance of 0.1mm, and then finish turning is finished by using a ball blade with the width of R2.5.
Furthermore, the shape of the hub deep groove is mainly controlled by a point on an inner inclined plane of the hub deep groove, and is formed by 4 diameters on a fixed intercept from the end face of the hub to the inner surface of the hub deep groove, and the step 4.4 is to measure each size of the hub deep groove.
The invention has the advantages and beneficial effects that:
the invention solves the problems of large processing difficulty and difficult guarantee of the size of the hub deep groove by making a process route, making the rough machining allowance of the hub deep groove, designing the rough machining clamping mode of the hub deep groove, carrying out numerical control machining on the hub deep groove and measuring the hub deep groove.
Drawings
FIG. 1 is a schematic diagram of rough turning process margin according to the present invention;
FIG. 2 is a diagram of a clamping mode when the hub is thick in a deep groove;
FIG. 3 is a diagram of a finish turning tool setting mode of the present invention;
figure 4 is a schematic diagram of the measurement of the deep groove of the hub according to the invention,
in the figure, 1 is the allowance left on each surface of the hub; 2-radial allowance; 3-axial allowance; 4-a hub end face of the first face; 5-a hub inner hole; 6-a compression surface; 7-a cutter setting point of the slotting cutter.
Detailed Description
The invention is further illustrated by the following examples, which are provided by way of illustration of the invention and are not intended to limit the scope of the invention.
Example 1
A processing method for a deep groove of a compressor disc hub comprises the following steps:
step 1, carrying out a rough turning process of a hub: sequentially carrying out rough turning on a first surface of the hub and a second surface of the hub, and after rough turning is finished, as shown in figure 1, leaving a margin 1 of 1.5mm on each surface of the hub; the allowance of the deep groove of the hub is divided into a radial allowance 2 and an axial allowance 3, wherein the radial allowance 2 is the depth of a groove of the deep groove of the hub, the smallest allowance of the groove bottom is not less than 1.5mm, the axial allowance 3 is the rough turning width of the deep groove of the hub, the width is 4.3mm, a groove cutter with the width of 4mm is used for processing during processing, the cutter is used for processing during processing, chip removal and full cooling of the cutter during turning of the deep groove of the hub are ensured, and the cutting depth is less than 1mm; the clamping mode when the hub is thick in a deep groove is shown in fig. 2, the hub end face 4 and the hub inner hole 5 of the first face are used as clamping references to press the compression face 6, so that the vibration of the hub and the cutter is reduced, the cutting force of the machining is counteracted, and the deformation of the compressor during the disc polishing is avoided;
step 2, placing the hub after rough turning into a furnace for heating, and performing stabilization treatment to eliminate the machining stress in the compressor disc;
step 3, performing a first surface turning reference process and a second surface turning reference process;
and 4, carrying out a finish turning processing technology of the hub: carrying out finish turning wheel hub first face external diameter, finish turning wheel hub second face external diameter, finish turning wheel hub first face and finish turning wheel hub second face in proper order, wherein, finish turning wheel hub second face includes following steps:
step 4.1, selecting a cutter, aligning the cutter and verifying the position of the cutter: the cutter bar of the cutter is provided with a double relief angle structure, the first cutting radius of the double relief angle structure is R75, the radius of the upper inner wall of the deep groove of the hub is R80, and the radius of the lower inner wall is R70; roughing selects a groove blade with the width R of 5mm and the width R of 0.8; finishing selects a groove blade with the width of 5mm and the width of R0.8 and a ball blade with the width of R2.5; as shown in fig. 3, when the position verification of the cutter and the cutter is specific, the center of the circle of R close to the inner hole of the compressor disk is selected as the origin of programming of the cutter center, and when the position verification of the cutter and the cutter is performed, the cutter-setting point 7 of the cutter is noted, so that the center of the circle of R is consistent with the center of the circle of the R in programming, and the position error of the cutter is prevented;
step 4.2, removing the allowance left on each surface of the hub during rough turning processing in the step 1, and processing the hub to a final surface;
step 4.3, rough machining: during rough machining, when the blade is turned to the bottom of the groove, turning parameters are paid attention to, specifically, the rotating speed and the feeding are reduced, and the rotating speed is guaranteed to be 15r/min and the feeding is guaranteed to be 0.1mm/r; when a rough machining feed route is designed, the cutter is retracted after cutting by 3 mm;
step 4.4, finish machining: before finishing, verifying whether the hub moves and aligning the position, and when finishing the deep groove of the hub, cutting into a cutter in an arc manner above the end surface of the hub on the second surface, and paying attention to the abrasion of the cutter and the cutting row; because the finishing allowance of the deep groove of the hub is uneven, a groove blade with the width of R0.8 of 5mm is firstly selected to remove the allowance when the hub is processed, so that each surface in the groove is left with the allowance of 0.1mm, then finishing finish turning is finished by using a ball blade with the width of R2.5, after finishing cutting, measuring the radial size and the groove width size of the deep groove of the hub, and if the size is unqualified, finishing again until the size is qualified; as shown in FIG. 4, when measuring each size of the deep groove of the hub, the measuring tool structure used comprises a ruler plate, a ruler frame, a contact and a reference block, the diameter size of a point on the inner inclined plane of the hub is measured by designing the contact which is the same as the intercept of the deep groove of the hub, a dial indicator is arranged on the outer side of the measuring tool, and before measurement, the measuring tool structure performs the counter on a special standard component and then performs the measurement.
Example 2
A processing method for a deep groove of a compressor disc hub comprises the following steps:
step 1, carrying out a rough turning process of a hub: sequentially carrying out rough turning on a first surface of the hub and a second surface of the hub, and after rough turning is finished, as shown in figure 1, leaving a margin 1 of 1.5mm on each surface of the hub; the allowance of the deep groove of the hub is divided into a radial allowance 2 and an axial allowance 3, wherein the radial allowance 2 is the depth of a groove of the deep groove of the hub, the smallest allowance of the groove bottom is not less than 1.5mm, the axial allowance 3 is the rough turning width of the deep groove of the hub, the width is 4.4mm, a groove cutter with the width of 4mm is used for processing during processing, the cutter is used for processing during processing, chip removal and full cooling of the cutter during turning of the deep groove of the hub are ensured, and the cutting depth is less than 1mm; the clamping mode when the hub is thick in a deep groove is shown in fig. 2, the hub end face 4 and the hub inner hole 5 of the first face are used as clamping references to press the compression face 6, so that the vibration of the hub and the cutter is reduced, the cutting force of the machining is counteracted, and the deformation of the compressor during the disc polishing is avoided;
step 2, placing the hub after rough turning into a furnace for heating, and performing stabilization treatment to eliminate the machining stress in the compressor disc;
step 3, performing a first surface turning reference process and a second surface turning reference process;
and 4, carrying out a finish turning processing technology of the hub: carrying out finish turning wheel hub first face external diameter, finish turning wheel hub second face external diameter, finish turning wheel hub first face and finish turning wheel hub second face in proper order, wherein, finish turning wheel hub second face includes following steps:
step 4.1, selecting a cutter, aligning the cutter and verifying the position of the cutter: the cutter bar of the cutter is provided with a double relief angle structure, the first cutting radius of the double relief angle structure is R75, the radius of the upper inner wall of the deep groove of the hub is R80, and the radius of the lower inner wall is R70; roughing selects a groove blade with the width R of 5mm and the width R of 0.8; finishing selects a groove blade with the width of 5mm and the width of R0.8 and a ball blade with the width of R2.5; as shown in fig. 3, when the position verification of the cutter and the cutter is specific, the center of the circle of R close to the inner hole of the compressor disk is selected as the origin of programming of the cutter center, and when the position verification of the cutter and the cutter is performed, the cutter-setting point 7 of the cutter is noted, so that the center of the circle of R is consistent with the center of the circle of the R in programming, and the position error of the cutter is prevented;
step 4.2, removing the allowance left on each surface of the hub during rough turning processing in the step 1, and processing the hub to a final surface;
step 4.3, rough machining: during rough machining, when the blade is turned to the bottom of the groove, turning parameters are paid attention to, specifically, the rotating speed and the feeding are reduced, and the rotating speed is ensured to be 20r/min and the feeding is ensured to be 0.1mm/r; when a rough machining feed route is designed, a cutter is retracted after cutting by 4 mm;
step 4.4, finish machining: before finishing, verifying whether the hub moves and aligning the position, and when finishing the deep groove of the hub, cutting into a cutter in an arc manner above the end surface of the hub on the second surface, and paying attention to the abrasion of the cutter and the cutting row; because the finishing allowance of the deep groove of the hub is uneven, a groove blade with the width of R0.8 of 5mm is firstly selected to remove the allowance when the hub is processed, so that each surface in the groove is left with the allowance of 0.1mm, then finishing finish turning is finished by using a ball blade with the width of R2.5, after finishing cutting, measuring the radial size and the groove width size of the deep groove of the hub, and if the size is unqualified, finishing again until the size is qualified; as shown in FIG. 4, when measuring each size of the deep groove of the hub, the measuring tool structure used comprises a ruler plate, a ruler frame, a contact and a reference block, the diameter size of a point on the inner inclined plane of the hub is measured by designing the contact which is the same as the intercept of the deep groove of the hub, a dial indicator is arranged on the outer side of the measuring tool, and before measurement, the measuring tool structure performs the counter on a special standard component and then performs the measurement.
Claims (6)
1. The processing method for the deep groove of the compressor disc hub is characterized by comprising the following steps of:
step 1, carrying out a rough turning process of a hub: sequentially carrying out rough turning on a first surface of the hub and a second surface of the hub, wherein the allowance left on each surface of the hub is 1.5mm after rough turning is finished; the allowance of the deep groove of the hub is divided into radial allowance and axial allowance, wherein the radial allowance is the depth of a groove of the deep groove of the hub, the smallest allowance of the groove bottom is not less than 1.5mm, the axial allowance is the rough turning width of the deep groove of the hub, the width is 4.2-4.4 mm, when in machining, a groove cutter with the width of 4mm is used for machining, when in machining, the groove cutter is used for machining, the chip removal and the full cooling of the cutter when the deep groove of the hub is turned are ensured, and the cutting depth is less than 1mm;
step 2, placing the hub after rough turning into a furnace for heating, and performing stabilization treatment to eliminate the machining stress in the compressor disc;
step 3, performing a first surface turning reference process and a second surface turning reference process;
and 4, carrying out a finish turning processing technology of the hub: carrying out finish turning wheel hub first face external diameter, finish turning wheel hub second face external diameter, finish turning wheel hub first face and finish turning wheel hub second face in proper order, wherein, finish turning wheel hub second face includes following steps:
step 4.1, selecting a cutter, aligning the cutter and verifying the position of the cutter: the cutter bar of the cutter is provided with a double relief angle structure, and the first cutting radius value of the double relief angle structure is between the radius value ranges of the upper inner wall and the lower inner wall of the deep groove of the hub;
step 4.2, removing the allowance left on each surface of the hub during rough turning processing in the step 1, and processing the hub to a final surface;
step 4.3, rough machining: during rough machining, when the blade is turned to the bottom of the groove, turning parameters are paid attention to, specifically, the rotating speed and the feeding are reduced, the rotating speed is ensured to be 10-20 r/min, and the feeding is ensured to be 0.1mm/r; when a rough machining feed path is designed, retracting a cutter after cutting 2-4 mm;
step 4.4, finish machining: before finishing, verifying whether the hub moves and aligns the position, when finishing the hub deep groove, cutting into a cutter in an arc manner above the end face of the hub on the second face, paying attention to abrasion of a cutter and row cutting of cutting, measuring the radial size and the groove width size of the hub deep groove after cutting, and if the size is unqualified, finishing again until the size is qualified.
2. The method for machining the deep groove of the hub of the compressor disc according to claim 1, wherein the clamping mode during the step 1 of coarsening the deep groove of the hub is as follows: the hub end face and the hub inner hole of the first surface are used as clamping references for clamping, so that vibration of the hub and the cutter is reduced, the cutting force of machining is counteracted, and deformation of the compressor disc during polishing is avoided.
3. The method for machining a deep groove in a hub of a compressor disk according to claim 1, wherein the step 4.1 tool is selected by: roughing selects a groove blade with the width R of 5mm and the width R of 0.8; the finishing selects a slot blade of 5mm width R0.8 and a ball blade of R2.5.
4. The method for machining deep grooves of a compressor disc hub according to claim 1, wherein the step 4.1 tool setting and tool position verification is specifically: the center of the R near the inner hole of the compressor disk is selected as the origin of programming of the cutter center, and when the positions of the cutter and the cutter are verified, the center of the R is ensured to be consistent with the center of the R during programming, so that the position error of the cutter is prevented.
5. The method for machining deep grooves of a hub of a compressor disk according to claim 1, wherein in the step 4.4, the finishing allowance of the deep grooves of the hub is not uniform, a groove blade with the width of 5mm and the width of R0.8 is selected to remove the allowance during machining, each surface in the groove is left with the allowance of 0.1mm, and then finish turning is finished by using a ball blade with the width of R2.5.
6. The method for machining deep slots of hub of compressor disk as claimed in claim 1, wherein the measuring tool structure used in step 4.4 is composed of rule plate, rule frame, contact and reference block, and features that the diameter of point on the inner inclined surface of hub is measured by designing contact whose intercept is same as that of deep slot of hub, a dial indicator is installed on the external surface of measuring tool, and before measuring, the measuring tool is used to measure the diameter of point on special standard part.
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| EP1967307A1 (en) * | 2007-03-08 | 2008-09-10 | Mattias Rutschinski | Method for manufacturing a rotor hub element with grooves |
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| CN115401406A (en) * | 2021-10-18 | 2022-11-29 | 宝鼎重工有限公司 | Finish machining method for CPP (casting polypropylene) variable pitch propeller hub assembly |
| CN115488360A (en) * | 2022-11-10 | 2022-12-20 | 中国航发沈阳黎明航空发动机有限责任公司 | Efficient turning method for annular mortise of high-temperature alloy disc |
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2023
- 2023-09-27 CN CN202311254607.8A patent/CN116984847B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1967307A1 (en) * | 2007-03-08 | 2008-09-10 | Mattias Rutschinski | Method for manufacturing a rotor hub element with grooves |
| WO2017057026A1 (en) * | 2015-09-28 | 2017-04-06 | 三菱電機株式会社 | Screw rotor machining method, machining device and machining tool, and method of manufacturing screw compressor |
| CN107214477A (en) * | 2017-06-12 | 2017-09-29 | 中国航发哈尔滨东安发动机有限公司 | A kind of compressor disc processing method |
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| CN115401406A (en) * | 2021-10-18 | 2022-11-29 | 宝鼎重工有限公司 | Finish machining method for CPP (casting polypropylene) variable pitch propeller hub assembly |
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| CN115488360A (en) * | 2022-11-10 | 2022-12-20 | 中国航发沈阳黎明航空发动机有限责任公司 | Efficient turning method for annular mortise of high-temperature alloy disc |
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| CN116984847B (en) | 2023-12-08 |
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