CN119635295B - Axial flow casing coating hole and flow channel processing device and processing method - Google Patents
Axial flow casing coating hole and flow channel processing device and processing methodInfo
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- CN119635295B CN119635295B CN202411621559.6A CN202411621559A CN119635295B CN 119635295 B CN119635295 B CN 119635295B CN 202411621559 A CN202411621559 A CN 202411621559A CN 119635295 B CN119635295 B CN 119635295B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
本申请公布了一种轴流机匣涂层孔与流道加工装置及加工方法，属于航空发动机制造技术领域，它包括小钻头、大钻头、第一支撑件：第一支撑件内开设有中部通孔，中部通孔位于活塞件上方为储油腔；限位件用于抵接压紧轴流机匣的内孔以对轴流机匣进行支撑，限位件内开设有调压腔；中部通孔位于活塞件下方为限位腔，推动组件用于推动活塞件进行升降，并在活塞件上升时将储油腔内的液压油推入调压腔，进而增大调压腔的压力以推动限位件膨胀压紧轴流机匣的内孔，反之在活塞件下降时松开限位件对轴流机匣内孔的压紧支撑。另外通过优化后的加工方法加工出的涂层孔光洁度较好，涂层无崩裂和隆起现象，同时加工出的流道变形较小，工艺稳定性大大提高。
This application discloses an axial flow casing coating hole and flow channel processing device and processing method, which belongs to the field of aviation engine manufacturing technology. It includes a small drill bit, a large drill bit, and a first support member: a central through hole is opened in the first support member, and the central through hole is located above the piston member and is an oil storage chamber; a limit member is used to abut and press the inner hole of the axial flow casing to support the axial flow casing, and a pressure regulating chamber is opened in the limit member; the central through hole is located below the piston member and is a limit chamber, and a pushing assembly is used to push the piston member to move up and down, and when the piston member rises, the hydraulic oil in the oil storage chamber is pushed into the pressure regulating chamber, thereby increasing the pressure of the pressure regulating chamber to push the limit member to expand and press the inner hole of the axial flow casing, and conversely, when the piston member descends, the limit member releases the pressing support of the inner hole of the axial flow casing. In addition, the coating hole processed by the optimized processing method has a good finish, and there is no cracking or bulging of the coating. At the same time, the deformation of the processed flow channel is small, and the process stability is greatly improved.
Description
Technical Field
The application relates to the technical field of aeroengine manufacturing, in particular to a processing device for a coating hole and a flow passage of an axial-flow casing. In addition, the application also relates to a processing method comprising the axial flow casing coating hole and flow passage processing device.
Background
The information provided in this section is for the purpose of generally presenting the context of the disclosure. Work of the presently named inventors, to the extent it is described in this section, as well as aspects of the description that may not otherwise qualify as prior art at the time of filing, are neither expressly nor impliedly admitted as prior art against the present disclosure.
The axial flow casing of the aeroengine is a thin-wall part, has the wall thickness of about 2-3mm, has poor rigidity and is easy to deform, is an important component of the turboshaft engine, and the working principle is that the guide blades and the stator blade rings assembled on the axial flow casing are combined with the rotor part to provide compressed air for the combustion chamber.
In order to facilitate the assembly of the guide blades and the stator blade ring, the axial-flow casing is generally designed into a half-structure, namely, the axial-flow casing consists of a left casing half and a right casing half, in order to adapt to the airflow and the volume change entering the casing, avoid the separation of the airflow, reduce the energy loss, design the inner wall of the casing into a smooth streamline flow passage, and in order to avoid the blade breakage caused by the scraping of the rotor blades and a part matrix due to the small gap between the rotor blades and the flow passage in the use process of the engine, the flow passage of the rotor blade assembly is turned, the single side of the matrix with the thickness of about 0.5-0.7mm is filled, and the flow passage part is machined in place after spraying. In addition, in order to be convenient for observe the internal part situation of axial compressor receiver, the peep hole can be processed in the spraying layer region to the axial compressor receiver of partial model.
The peephole at the coating of the existing axial flow casing is shown in figure 1 of the specification. Taking a certain type of axial flow casing made of stainless steel (ZG 06Cr16Ni5 Mo) as an example, the diameter of a peeping hole is phi 7, the depth is about 9.5mm, the thickness of a coating is about 0.6mm, and the processing method is as follows:
1. machining a guide hole in the center of the hole by adopting a center drill, wherein the depth of the guide hole is about 1mm;
2. adopting a drill bit with the diameter of about phi 6.5mm to machine the hole in a pecking and drilling mode;
3. And machining the aperture to a final size by using a buried drill or boring cutter.
Holes processed by the method can generate local cracking or swelling of the coating at the outlet of the coating, and the design requirement cannot be met.
Meanwhile, the dimensional requirement precision of the flow channel part of the existing axial flow casing is higher, the circular runout is generally 0.05|A|B, the contour degree is generally 0.1|A|B, the spraying treatment is needed during processing, the total thickness of a sprayed coating is more than or equal to 2mm, a large amount of internal stress is generated on the casing body during spraying, the two casing halves of the part are deformed, and the larger the casing size is, the thinner the wall thickness is, and the larger the deformation is. After the residual amount of the subsequent coating is removed, the part needs to be placed for a period of time after being disassembled, and in the process, the internal stress between the coating and the matrix can be released, so that the part is deformed out of tolerance, the deformation amount is about 0.05-0.16mm, and the deformation in the coating processing process is shown in the figure 2.
If the spraying processing is carried out according to the conventional process method, the sprayed flow passage area is directly processed in place in one process, and the part is deformed due to insufficient stress release, so that the size is out of tolerance, and the performance of the engine is affected. In addition, because the machine casket has different size and dimension, often need many sets of different clamping tools to carry out the clamping to the machine casket just can conveniently process, be unfavorable for reducing holistic cost of manufacture, and clamping is adjusted inflexibly conveniently, influences the efficiency of processing.
The quality problems existing in the processing process of the coating holes and the flow channels of the axial-flow casing parts of the aero-engine are already important quality problems which need to be solved by a certain aero-engine.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
In view of at least one of the above technical problems, the application provides an axial flow casing coating hole and runner processing device, which can stably support axial flow casings of different sizes in a propping manner through a limiting piece, and can conveniently adjust the supporting outer diameter of the limiting piece so as to adapt to the compaction limiting support of inner holes of different axial flow casings.
The application also provides a processing method of the axial-flow casing coating hole and runner processing device, wherein the coating hole processed by the optimized processing method has good finish, the coating has no phenomena of cracking and bulging, and the processed runner has small deformation and greatly improved process stability.
According to one aspect of the present application, there is provided an axial flow casing coating hole and runner machining device including a small drill bit, a large drill bit, a milling cutter, and a boring cutter, the axial flow casing coating hole and runner machining device being configured to clamp an axial flow casing for machining the coating hole and runner, the axial flow casing coating hole and runner machining device including a base, a first support, a second support, a stopper, and a pushing assembly:
the first support piece is arranged on the base, a middle through hole is formed in the first support piece, a piston piece is movably arranged in the middle through hole, the middle through hole is positioned above the piston piece and is used for storing hydraulic oil;
The second support piece annular arrays are arranged at the tops of the first support pieces, the limiting pieces are arranged at the tail ends of the second support pieces, the limiting pieces are used for abutting against the inner holes of the compression axial flow cases to support the axial flow cases, the pressure regulating cavities are formed in the limiting pieces, the oil passing holes are formed in the second support pieces, and the oil passing holes are used for communicating the oil storage cavities with the pressure regulating cavities;
the middle through hole is positioned below the piston piece and is a limiting cavity, the pushing component is movably arranged in the limiting cavity, the pushing component is used for pushing the piston piece to lift, hydraulic oil in the oil storage cavity is compressed and pushed into the pressure regulating cavity from the oil passing hole when the piston piece ascends, and then the pressure of the pressure regulating cavity is increased to push the limiting piece to expand and compress an inner hole of the axial flow casing, otherwise, the compressing and supporting of the limiting piece to the inner hole of the axial flow casing are loosened when the piston piece descends.
In some embodiments of the present application, the pushing assembly includes a mounting frame, a rotating member, a first pushing member and a second pushing member, where the mounting frame is disposed on a side wall of the first supporting member, the mounting frame is used to communicate with the limiting cavity, the rotating member is rotatably disposed on the side wall of the mounting frame along a horizontal direction and is connected with the side wall of the mounting frame through threads, the second pushing member is connected with a bearing preset on a first end of the rotating member located in the limiting cavity, the first pushing member is connected with a bottom of the piston member, and the rotating member is used to drive the second pushing member to move along the horizontal direction in a screwing-in and screwing-out process, so that the second pushing member drives the first pushing member and the piston member to lift.
In some embodiments of the application, the first pushing member comprises a pushing block and a connecting rod, the connecting rod is arranged at the top of the pushing block, the top end of the connecting rod is connected with the bottom of the piston member, the bottom surface of the pushing block is of an inclined surface structure, the second pushing member is of a frustum structure, and the second pushing member is used for being abutted against the bottom surface of the pushing block through the side wall of the inclined structure.
In some embodiments of the present application, a side surface of the mounting frame, which is far away from the first supporting member, is provided with a side cover, the side cover is connected with the mounting frame through a bolt, the rotating member is arranged on the side cover in a penetrating manner and is connected with the side cover through threads, and a hand wheel is arranged at the second end of the rotating member.
In some embodiments of the application, a top cover is arranged at the top of the first support member, a compression spring is arranged in the oil storage cavity, and the compression spring is sprung between the top cover and the piston member.
In some embodiments of the present application, the limiting member includes a telescopic side plate and a limiting side plate, the outer wall of the limiting side plate is used for abutting against an inner hole of the supporting axial flow casing, the telescopic side plate is provided with a plurality of telescopic side plates, the plurality of telescopic side plates are used for being circumferentially arranged along the inner wall of the limiting side plate and surrounding the limiting side plate to form a pressure regulating cavity, and each telescopic side plate is further used for being connected with the tail end of the second supporting member.
In some embodiments of the present application, the limiting member further includes a connecting side plate, the connecting side plate is disposed on an end surface of the telescopic side plate near one side of the second supporting member, a boss-shaped mounting platform is disposed at a tail end of the second supporting member, and the connecting side plate is used for attaching to the mounting platform and connecting and fastening the two by bolts.
In some embodiments of the application, the telescoping side plates are made of an elastic material.
According to another aspect of the present application, there is also provided a method for processing an axial-flow casing coating hole and a flow passage, using the above axial-flow casing coating hole and flow passage processing device, comprising the steps of:
s100, when a coating hole is machined, a large drill bit is used for machining to a coating position of an axial flow casing, and the machining is stopped;
s200, drilling through the coating by using a small drill bit to form small perforations;
S300, reaming the bottom of the small perforation of the coating in S200 by using a milling cutter in a spiral milling mode;
s400, machining the aperture of the hole with small reaming thickness and small perforation in place by using a boring cutter by adopting a small feeding method;
S500, when a casing flow channel is machined, firstly combining two halves of the sprayed axial-flow casing;
s600, carrying out rough machining on the sprayed runner by a turning process, reserving a margin of 0.25mm on a single side, and turning the runner surface in three layers during machining to gradually release stress;
S700, decomposing the combined axial-flow casing into two half casings, and repairing the end surface standard of the casing;
S800, combining the two half cases, and carrying out finish machining on the flow passage area in place by supporting the large end of the axial flow case.
In some embodiments of the application, the reaming is performed in the step S300 by adopting a mode of removing the allowance parallel to the coating inclined plane, in the step S600, three layers are turned in the rough machining, and the parts are realigned after each layer of turning, wherein the allowance for removing the first layer is about 0.5-0.6mm, the allowance for removing the second layer is 0.8-1mm, the allowance for removing the third layer is 0.1-0.2mm, and the allowance reserved after three times of cutting is 0.25mm on one side.
The application has the following beneficial effects:
According to the axial flow casing coating hole and flow channel processing device, the first supporting piece is used for supporting the second supporting piece, the second supporting piece is arranged on the top of the first supporting piece in an annular array mode, the tail end of the second supporting piece is connected with the limiting piece, the pressure regulating cavity in the limiting piece is communicated with the oil storage cavity through the oil passing hole, the internal pressure of the oil storage cavity can be changed through lifting pushing of the piston piece, the piston piece is pushed to rise through the pushing component, the pressure of the pressure regulating cavity is increased, the limiting piece is enabled to expand and compress the inner holes of the axial flow casing to conduct reinforcing limiting support, the supporting of the inner holes with different sizes can be adapted to tight supporting, the pushing component is used for driving the piston piece to descend, the pressure of the pressure regulating cavity can be adjusted, the limiting piece is enabled to loosen the supporting of the axial flow casing, and therefore supporting limiting operation of the inner holes of the axial flow casings with different sizes can be conveniently achieved through the clamping device.
The processing method of the coating holes and the flow channels of the axial-flow casing has the advantages that the processing method of the coating holes and the flow channels is optimized and improved according to the processing difficulty of the coating holes and the flow channels of the axial-flow casing parts of the aero-engine, the phenomena of coating bursting and swelling are effectively avoided, the qualification of the size processing of the flow channels is ensured, and the delivery quality of the parts is improved.
Of course, it is not necessary for any one product to practice the application to achieve all of the advantages set forth above at the same time. In addition to the objects, features and advantages described above, the present application has other objects, features and advantages. The present application will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic view of a peephole at a coating of an axial flow case of the present application;
FIG. 2 is a schematic illustration of deformation during a prior art coating process;
FIG. 3 is a schematic view of an axial flow case according to a preferred embodiment of the present application;
FIG. 4 is a schematic illustration of a flow passage coating on an axial flow case according to a preferred embodiment of the present application;
FIG. 5 is a schematic view of the installation of the first support and the second support of the preferred embodiment of the present application;
FIG. 6 is a schematic structural view of a preferred embodiment of the present application;
FIG. 7 is a schematic view showing the internal structure of the first support and the second support according to the preferred embodiment of the present application;
FIG. 8 is a schematic structural view of a pushing assembly according to a preferred embodiment of the present application;
FIG. 9 is a flow chart of the machining of the receiver flow path in accordance with the preferred embodiment of the present application;
The axial flow machine case is characterized by comprising 100 parts of an axial flow machine case, 1 part of a base, 2 parts of a first supporting piece, 21 parts of a limiting cavity, 22 parts of an oil storage cavity, 23 parts of a top cover, 3 parts of a second supporting piece, 31 parts of an oil passing hole, 32 parts of a mounting platform, 4 parts of a limiting piece, 41 parts of a connecting side plate, 42 parts of a telescopic side plate, 43 parts of a limiting side plate, 44 parts of a pressure regulating cavity, 5 parts of a mounting frame, 51 parts of a side cover, 6 parts of a rotating piece, 61 parts of a hand wheel, 7 parts of a piston piece, 8 parts of a compression spring, 9 parts of a first pushing piece, 91 parts of a pushing piece, 92 parts of a connecting rod and 10 parts of a second pushing piece.
Detailed Description
Embodiments of the application are described in detail below with reference to the attached drawing figures, but the application can be practiced in a number of different ways, as defined and covered below.
Fig. 1 is a schematic view of peeping holes at a coating of an axial flow casing according to the present application, fig. 2 is a schematic view of deformation generated during a conventional coating process, and fig. 3 is a schematic view of a structure of an axial flow casing according to a preferred embodiment of the present application;
Fig. 4 is a schematic view of a flow passage coating on an axial flow casing according to a preferred embodiment of the present application, fig. 5 is a schematic view of installation of a first support member and a second support member according to a preferred embodiment of the present application, fig. 6 is a schematic view of the structure of the first support member and the second support member according to a preferred embodiment of the present application, fig. 7 is a schematic view of the internal structure of the first support member and the second support member according to a preferred embodiment of the present application, fig. 8 is a schematic view of the pushing assembly according to a preferred embodiment of the present application, and fig. 9 is a flow chart of a flow passage processing of the casing according to a preferred embodiment of the present application.
The utility model provides an axial compressor receiver coating hole and runner processingequipment, includes little drill bit, big drill bit, milling cutter and boring cutter, axial compressor receiver coating hole and runner processingequipment are used for carrying out the clamping in order to carry out the processing of coating hole and runner to axial compressor receiver 100, and axial compressor receiver coating hole and runner processingequipment include base 1, first support piece 2, second support piece 3, locating part 4 and promote the subassembly:
The first support piece 2 is arranged on the base 1, a middle through hole is formed in the first support piece 2, a piston piece 7 is movably arranged in the middle through hole, an oil storage cavity 22 is arranged above the piston piece 7 and is used for storing hydraulic oil, and the oil storage cavity 22 is used for storing hydraulic oil;
The annular arrays of the second supporting pieces 3 are arranged at the top of the first supporting piece 2, the limiting pieces 4 are arranged at the tail ends of the second supporting pieces 3, the limiting pieces 4 are used for abutting against the inner holes of the compression axial flow casing 100 to support the axial flow casing 100, the pressure regulating cavities 44 are formed in the limiting pieces 4, the oil passing holes 31 are formed in the second supporting pieces 3, and the oil passing holes 31 are used for communicating the oil storage cavities 22 with the pressure regulating cavities 44;
The middle through hole is positioned below the piston piece 7 and is provided with a limiting cavity 21, the pushing component is movably arranged in the limiting cavity 21 and used for pushing the piston piece 7 to lift, hydraulic oil in the oil storage cavity 22 is compressed and pushed into the pressure regulating cavity 44 from the oil passing hole 31 when the piston piece 7 ascends, and then the pressure of the pressure regulating cavity 44 is increased to push the limiting piece 4 to expand and compress the inner hole of the axial flow casing 100, otherwise, the compressing support of the limiting piece 4 to the inner hole of the axial flow casing 100 is released when the piston piece 7 descends.
Optionally, an oil outlet can be formed in the bottom of the pressure regulating cavity 44 and plugged by plugging, so that the hydraulic oil in the limiting piece 4 can be conveniently recycled.
According to the axial flow casing coating hole and flow channel processing device, the first supporting piece 2 is used for supporting the second supporting piece 3, the second supporting piece 3 is arranged at the top of the first supporting piece 2 in an annular array, the tail end of the second supporting piece 3 is connected with the limiting piece 4, the pressure regulating cavity 44 in the limiting piece 4 is communicated with the oil storage cavity 22 through the oil passing hole 31, the internal pressure of the oil storage cavity 22 can be changed through lifting pushing of the piston piece 7, the pushing component is used for pushing the piston piece 7 to rise, the pressure of the pressure regulating cavity 44 is increased, the limiting piece 4 expands and presses the inner holes of the axial flow casing 100 to carry out reinforcing limiting support, and the pushing component is used for driving the piston piece 7 to descend, so that the pressure of the pressure regulating cavity 44 can be regulated, the limiting piece 4 can loosen the support of the axial flow casing 100, and the supporting limiting operation of the inner holes of the axial flow casings 100 with different sizes can be conveniently realized through a clamping device.
Preferably, referring to fig. 5, 6 and 7, the pushing assembly includes a mounting frame 5, a rotating member 6, a first pushing member 9 and a second pushing member 10, the mounting frame 5 is disposed on a side wall of the first supporting member 2, the mounting frame 5 is communicated with the limiting cavity 21, the rotating member 6 rotatably penetrates through the side wall of the mounting frame 5 along a horizontal direction and is connected with the side wall of the mounting frame 5 through a thread, the second pushing member 10 is connected with a bearing preset on a first end of the rotating member 6 in the limiting cavity 21, the first pushing member 9 is connected with a bottom of the piston member 7, and the rotating member 6 is used for driving the second pushing member 10 to move along the horizontal direction in a screwing-in and screwing-out process, so that the second pushing member 10 drives the first pushing member 9 and the piston member 7 to lift.
Specifically, the first pushing piece 9 comprises a pushing block 91 and a connecting rod 92, the connecting rod 92 is arranged at the top of the pushing block 91, the top end of the connecting rod 92 is connected with the bottom of the piston piece 7, the bottom surface of the pushing block 91 is of an inclined surface structure, the second pushing piece 10 is of a frustum structure, and the second pushing piece 10 is used for being abutted against the bottom surface of the pushing block 91 through the side wall of the inclined structure.
It can be understood that the operator screws the rotating member 6 into the limiting cavity 21 to drive the second pushing member 10 to translate, and the second pushing member 10 props up to push the first pushing member 9 and the piston member 7 to move upwards, so that the pressure in the oil storage cavity 22 and the pressure regulating cavity 44 is increased, the expansion of the limiting member 4 is controlled to tightly press and support the inner hole of the axial flow casing 100, otherwise, the supporting of the limiting member 4 to the inner hole of the axial flow casing 100 can be loosened by only screwing out the rotating member 6, and the regulating operation is very convenient.
The bottom surface of the first pushing piece 9 is an inclined surface, and can be attached to the side wall of the second pushing piece 10 with the highest structure, and displacement of the first pushing piece 9 and the piston piece 7 can be accurately controlled through the second pushing piece 10, so that accurate and stable support of the limiting piece 4 on the inner hole of the axial casing 100 is realized.
It should be noted that, the rotating member 6 may be a screw, and the standard member is used to facilitate maintenance and replacement of the rotating member 6.
Preferably, as shown in fig. 7, a side surface of the mounting frame 5 away from the first supporting member 2 is provided with a side cover 51, the side cover 51 is connected with the mounting frame 5 through bolts, the rotating member 6 is arranged on the side cover 51 in a penetrating manner and is connected with the side cover 51 through threads, and a hand wheel 61 is arranged at the second end of the rotating member 6.
It can be understood that the structure that can conveniently dismantle through the side cap 51, and then be convenient for realize the dismouting and the maintenance of rotating piece 6 and second impeller 10, can conveniently clear up spacing chamber 21 inside after taking down side cap 51 simultaneously, including hydraulic oil and the residue etc. that leak to guarantee the smoothness nature of piston member 7 activity, avoid taking place phenomenon such as jamming.
Preferably, as shown in fig. 6, 7 and 8, a top cover 23 is disposed on top of the first support member 2, a compression spring 8 is disposed in the oil storage chamber 22, and the compression spring 8 is sprung between the top cover 23 and the piston member 7.
It will be appreciated that hydraulic oil can be conveniently added into the oil storage cavity 22 by detaching the top cover 23, and the compression spring 8 provides an elastic force for pushing the piston member 7 away from the top cover 23, so as to realize the descending and resetting of the piston member 7, so that the piston member 7 is pushed by the pushing assembly to perform repeated lifting movement, and the pressure regulating cavity 44 can be protected, so that the excessive pressure of the pressure regulating cavity 44 caused by the excessive lifting of the piston member 7 is prevented, and the service life of the limiting member 4 is influenced.
Preferably, referring to fig. 1, the limiting member 4 includes a telescopic side plate 42 and a limiting side plate 43, the outer wall of the limiting side plate 43 is used for abutting and supporting an inner hole of the axial-flow casing 100, the telescopic side plate 42 is provided with a plurality of telescopic side plates 42, the plurality of telescopic side plates 42 are arranged along the circumferential direction of the inner wall of the limiting side plate 43 and are enclosed with the limiting side plate 43 to form a pressure regulating cavity 44, and each telescopic side plate 42 is further used for being connected with the tail end of the second supporting member 3.
Specifically, the limiting piece 4 further comprises a connecting side plate 41, the connecting side plate 41 is arranged on the end face of the telescopic side plate 42, which is close to one side of the second supporting piece 3, the tail end of the second supporting piece 3 is provided with a boss-shaped mounting platform 32, and the connecting side plate 41 is used for being attached to the mounting platform 32 and connecting and fastening the mounting platform 32 through bolts.
It can be understood that the telescopic side plates 42 and the limiting side plates 43 around form a pressure regulating cavity 44, and the telescopic side plates 42 and the limiting side plates 43 are driven to deform by the pressure change of the pressure regulating cavity 44, so that the limiting piece 4 is integrally expanded or contracted, and the supporting of the limiting side plates 43 to the inner holes of the axial-flow casing 100 with different sizes is realized.
The connecting side plate 41 is connected with the mounting platform 32 through bolts, so that the limiting piece 4 can be conveniently dismounted, and meanwhile, a sealing surface with a good effect can be realized at the mounting surface of the mounting platform 32, and the pressure establishment and adjustment of the pressure regulating cavity 44 are ensured. Optionally, a rubber gasket is provided at the interface of the connecting side plate 41 and the mounting platform 32 to enhance the sealing effect.
Preferably, the telescoping side plates 42 are made of an elastic material.
It can be appreciated that the telescopic side plate 42 is made of elastic material, so that the telescopic side plate 42 can be ensured to have larger extensibility, and the overall larger expansion range of the limiting piece 4 is realized, so as to adapt to the compression supporting requirements of the inner holes of the axial flow casing 100 at different positions. Meanwhile, the telescopic side plate 42 made of elastic materials can also have a certain buffer protection effect with the limiting side plate 43, so that the limiting side plate 43 is prevented from being in direct rigid contact with the axial-flow casing 100, and collision damage is easy to occur.
Optionally, the outer wall of the limiting side plate 43 is provided with a rubber pad. The rubber pad can play a role in further buffering protection, and friction force between the rubber pad and the inner hole of the axial flow casing 100 can be increased.
According to another aspect of the present application, there is also provided a method for processing an axial-flow casing coating hole and a flow passage, using the above axial-flow casing coating hole and flow passage processing device, comprising the steps of:
S100, when a coating hole is machined, machining the coating hole to the coating position of the axial flow casing 100 by using a large drill bit, and stopping;
s200, drilling through the coating by using a small drill bit to form small perforations;
S300, reaming the bottom of the small perforation of the coating in S200 by using a milling cutter in a spiral milling mode;
s400, machining the aperture of the hole with small reaming thickness and small perforation in place by using a boring cutter by adopting a small feeding method;
S500, when a casing flow channel is machined, firstly combining two halves of the sprayed axial-flow casing 100;
s600, carrying out rough machining on the sprayed runner by a turning process, reserving a margin of 0.25mm on a single side, and turning the runner surface in three layers during machining to gradually release stress;
s700, decomposing the combined axial flow case 100 into two half cases, and repairing the case end surface standard;
s800, combining the two half cases, and finishing the flow passage area in place by bearing against the large end of the axial flow case 100.
In the step S600, three layers are turned in the rough machining, parts are realigned after each layer of turning, the first layer is removed by 0.5-0.6mm, the second layer is removed by 0.8-1mm, the third layer is removed by 0.1-0.2mm, and the reserved allowance after three times of cutting is 0.25mm on one side.
The processing method of the coating holes and the flow channels of the axial-flow casing has the advantages that the processing method of the coating holes and the flow channels is optimized and improved according to the processing difficulty of the coating holes and the flow channels of the axial-flow casing parts of the aero-engine, the phenomena of coating bursting and swelling are effectively avoided, the qualification of the size processing of the flow channels is ensured, and the delivery quality of the parts is improved.
The application discloses a machining method of a casing coating hole and a flow channel, which is mainly implemented in the machining of a novel aero-engine axial-flow casing:
the specific operation of machining the casing coating hole is as follows (taking the diameter phi 7mm and the hole depth 9.5mm as examples):
1. Machining a guide hole with the depth of 1mm at the center of the hole by adopting a center drill, and setting a cutter point at the linear speed of 17-19m/s and the feeding speed of 35-40mm/min;
2. Machining the coating position (about 8.9mm deep) by using a drill with the diameter of 6.5mm in a pecking mode, aligning a drill point, machining the pecking drill at the depth of 2mm each time, and carrying out linear speed of 19-21m/s and feeding speed of 30-35mm/min;
3. Processing the coating part from 6mm deep to 10mm deep by using a phi 2mm drill bit, and drilling through the coating part at the linear speed of 14-16m/s and the feeding rate of 30-35mm/min;
4. A milling cutter with the diameter of 4mm is used for milling holes in a spiral way from a circle center to a cutter from the depth of 4mm to the depth of 10mm, the aperture of the bottom of the holes is expanded to the diameter of 6.5mm, the linear speed is 17-19m/s, the feeding rate is 30-35mm/min, the spiral milling parameters are that the spiral distance is 0.15-0.25mm, and the final depth feeding rate is 15-20mm/min;
5. The single-edge boring cutter with the diameter of phi 7 is used for processing the aperture to the diameter of phi 7mm, the processing depth is 10mm, the linear speed is 28-32m/s, and the feeding rate is 30-35mm/min.
The coating hole processed by the steps has good smoothness, the coating has no chipping and bulging phenomena, and the coating holes with the rest apertures are processed by selecting cutters with corresponding sizes according to the steps.
The concrete operation of the machining of the casing flow passage is as follows:
1. Grinding off redundant coating on the joint surface of the two half cases after spraying, and mounting the two half cases on bolt holes on the longitudinal mounting edges of the two half cases by adopting a precise positioning bolt;
2. Clamping the part, aligning the standard circle symmetrical four-point runout not more than 0.02mm, turning the coating into three layers, re-aligning after each layer of turning, wherein the first layer is removed by about 0.5-0.6mm, the second layer is removed by 0.8-1mm, the third layer is removed by 0.1-0.2mm, the reserved allowance after three times of cutting is 0.25mm on a single side, and cutting parameters are that the linear speed is 70-80m/min, the feeding amount is 0.08-0.1mm/min, and the cutting depth is 0.5-0.6mm;
3. dismantling bolts of the longitudinal installation edges, and decomposing the combined axial-flow casing into two half casings;
4. grinding the end surface references of the two half cases, so that the subsequent process is convenient to support;
5. combining the two half cases by adopting a precise positioning bolt;
6. Clamping the parts, aligning the parts, wherein the jumping of four symmetrical points (the longitudinal joint surface direction and the vertical joint surface direction) of the reference circle is not more than 0.005mm, turning by two cutters, wherein the turning quantity of the first cutter is 0.15mm on one side, checking the jumping of the reference circle after turning is not more than 0.005mm, otherwise, re-aligning the parts, removing the rest of 0.1mm by the second cutter, and cutting the parts with cutting parameters of 70-80m/min linear speed, 0.08-0.1mm/min feed quantity and 0.5-0.6mm cutting depth.
The flow channel processed by the method has small deformation, greatly improves the process stability, and improves the flow channel jumping and contour degree qualification rate to 100 percent.
The inventor finds that the reason of coating bursting or uplift is that cutting force is overlarge, a large-diameter drill bit and a large-diameter buried drill are directly adopted to process and remove more allowance, the cutting force is large, local bursting of the coating is easy to cause, and when the drill point is processed from a part substrate part to a coating part, extrusion force perpendicular to the coating inclined plane can be generated on the coating part, so that the coating bulges outwards from the middle, and the drill bit is directly large, and can be connected with the loosening or separation of a coating area near an orifice and the substrate, and the coating near the orifice is extremely easy to burst due to the stress when the buried drill or the boring drill is adopted to process subsequently.
Therefore, the application adopts the small-diameter drill bit (phi 2 mm) to dry and pass the coating, reduces the cutting force, avoids the coating from being extruded and cracked and raised due to overlarge cutting force, adopts the phi 4mm milling cutter to expand the hole to phi 6.5mm in a spiral milling mode, adopts the force parallel to the inclined surface of the coating to remove the allowance, and finally has less allowance of 0.5mm, and adopts the boring cutter with single blade to further reduce the cutting force and avoid the coating from being extruded and cracked and raised.
The flow channel processed by the improved processing scheme has small deformation aiming at the problems of deformation after spraying and subsequent turning deformation, and the deformation of the part after combination and disassembly is about 0.008-0.02mm, so that the design requirement can be met. The principle is that the internal stress between the coating and the matrix is larger, the two ends of the joint surface of the part shrink inwards seriously, three layers are needed to be turned during rough machining, the part is re-aligned after each layer of turning, and the internal stress between the coating and the matrix is gradually released during turning, so that the uniformity of the removal amount of the coating can be ensured and the deformation of the machined part can be reduced by layered cutting, thereby avoiding the dimension out of tolerance. After rough turning, the part is decomposed, so that the stress of the part can be further released, and the clamping alignment and measurement errors during the fine machining of the part can be reduced by using a grinding reference.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present application and its core ideas. The foregoing is merely illustrative of the preferred embodiments of the application, and it will be appreciated that numerous modifications, adaptations and variations of the application can be made by those skilled in the art without departing from the principles of the application, and that other features and advantages of the application can be combined in any suitable manner, and that no improvement in the design or design of the application is intended to be applied directly to other applications.
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| CN218775715U (en) * | 2022-07-06 | 2023-03-31 | 武汉天昱智能制造有限公司 | Aeroengine machine casket bearing mounting hole processingequipment |
| CN117020574A (en) * | 2023-07-14 | 2023-11-10 | 中国航发南方工业有限公司 | Processing method of aero-engine bearing casing and aero-engine bearing casing |
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| RU2316644C2 (en) * | 2004-08-16 | 2008-02-10 | Общество с ограниченной ответственностью "Кавказтрансгаз" Открытого акционерного общества "Газпром" | Mechanical-hydraulic perforator |
| CN219853358U (en) * | 2023-05-16 | 2023-10-20 | 苏州翰微材料科技有限公司 | A modular tooling fixture for clamping aviation high-temperature alloy casing components |
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| CN218775715U (en) * | 2022-07-06 | 2023-03-31 | 武汉天昱智能制造有限公司 | Aeroengine machine casket bearing mounting hole processingequipment |
| CN117020574A (en) * | 2023-07-14 | 2023-11-10 | 中国航发南方工业有限公司 | Processing method of aero-engine bearing casing and aero-engine bearing casing |
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