CN111673216B - Machining device and machining method for profile air inlet groove of integral impeller outer cover - Google Patents
Machining device and machining method for profile air inlet groove of integral impeller outer cover Download PDFInfo
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- CN111673216B CN111673216B CN202010657593.4A CN202010657593A CN111673216B CN 111673216 B CN111673216 B CN 111673216B CN 202010657593 A CN202010657593 A CN 202010657593A CN 111673216 B CN111673216 B CN 111673216B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
Abstract
The invention discloses a processing device for a profile air inlet groove of an integral impeller outer cover, which comprises: the positioning fixture comprises a positioning indexing disc, a clamping body coaxially and rotatably connected with the indexing disc, a positioning pin and a locking part, wherein the indexing disc is used for being fixedly connected with a machined part, positioning holes are respectively and correspondingly formed in the indexing disc corresponding to air inlet grooves of the machined part, the clamping body is provided with positioning through holes matched with the positioning holes, the positioning pin is used for being inserted into the positioning through holes and the positioning holes so as to limit the indexing disc and the clamping body, and the locking part is used for fixing the indexing disc and the clamping body; and the molded electrode is used for processing the positioning groove. The invention also discloses a processing method adopting the processing device. By applying the processing device and the processing method, the problem that the profile of the integral impeller outer cover which cannot be processed by a numerical milling machine enters the air inlet groove can be solved. And the angular position of the air inlet groove is controlled by the positioning hole and the index plate in the machining process, so that the operation is convenient, the preparation time is short, the machining efficiency is improved, and the machining error is avoided.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a machining device and a machining method for a profile air inlet groove of an integral impeller outer cover.
Background
The traditional impeller outer cover is formed by brazing and combining a base profile upper hole and a base profile upper groove which are machined by each single piece, and then machining a profile and an assembly hole. Therefore, the air inlet groove on the profile of the impeller housing can be finished by a plurality of milling processes in a single-piece machining process.
In order to improve the stability of the overall performance of the aircraft engine, the machining of the integral impeller outer cover is carried out by forging a blank. The impeller outer cover formed by the forging blank integral machine is stable in performance, but the machining difficulty is greatly improved, for example, an air inlet groove on an inner profile cannot be machined by adopting a numerical milling machine due to interference, and only electric spark machining can be carried out. Particularly, for the air inlet grooves on the inner profile surface with the coating, the peripheral coating can fall off after the matrix of the coating part is subjected to the numerical milling, so that the numerical milling cannot be adopted for processing, and only the electric spark processing can be carried out. At present, in the electric spark machining process, small electrodes are adopted for reciprocating machining, the quality of machined grooves is poor, and because each impeller is covered with six air inlet grooves, part positions need to be changed when machining positions are changed every time, the machining period is long, and the efficiency is low.
To sum up, how to effectively solve the problems of low machining efficiency and the like of the profile air inlet groove of the integral impeller outer cover is a problem to be solved by the technical personnel in the field at present.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide a processing apparatus for an air inlet groove of an integral impeller shroud profile, the structural design of the processing apparatus can effectively solve the problem of low processing efficiency of the air inlet groove of the integral impeller shroud profile, and a second object of the present invention is to provide a processing method using the processing apparatus.
In order to achieve the first object, the present invention provides the following technical solutions:
a processing device for an integral impeller housing profile air inlet groove comprises:
the positioning fixture comprises a positioning indexing disc, a clamping body coaxially and rotatably connected with the indexing disc, a positioning pin and a locking part, wherein the indexing disc is used for being fixedly connected with a machined part, positioning holes are respectively and correspondingly formed in the indexing disc corresponding to the air inlet grooves of the machined part, the clamping body is provided with positioning through holes matched with the positioning holes, the positioning pin is used for being inserted into the positioning through holes and the positioning holes so as to limit the indexing disc and the clamping body, and the locking part is used for fixing the indexing disc and the clamping body;
and the molded electrode is used for processing the positioning groove.
Preferably, in the processing device for the profile air inlet groove of the body impeller outer cover, the positioning fixture further comprises a positioning disc, the positioning disc is used for being fixedly connected with a processing part, and the positioning disc is fixedly connected with the dividing disc.
Preferably, in the machining device for the profile air inlet groove of the body impeller outer cover, the positioning disc is fixedly connected with the index plate through a cylindrical pin.
Preferably, in the machining device for the profile air inlet groove of the body impeller outer cover, the positioning disc is fixedly connected with the machined part through an angle pin and a compression screw.
Preferably, in the processing device for the profile air inlet groove of the outer cover of the body impeller, the locking component is a tightening handle, and the tightening handle rotates to enable the dividing plate and the clamping body to be pressed and fixed.
Preferably, in the processing device for the profile air inlet groove of the outer cover of the body impeller, a rotating shaft is arranged at the center of the clamping body, a mounting hole is formed in the center of the dividing plate, the rotating shaft is inserted into the mounting hole, so that the dividing plate can wind the rotating shaft to rotate, the tightening handle comprises a handle, a screw fixedly connected with the handle, a tightening plate in threaded fit with the screw and a pull rod in threaded fit with the tightening plate, the tightening plate is located on one side of the clamping body, which is deviated from the dividing plate, the pull rod penetrates through a through hole in the rotating shaft, a flange is arranged at one end of the pull rod and abuts against the dividing plate, the other end of the pull rod is matched with the tightening plate, and the tightening plate is driven to tighten the pull rod when the screw rotates, so that the dividing plate and the clamping body are locked.
Preferably, in the above processing apparatus for the gas inlet groove in the profile of the body impeller housing, the size of the forming electrode is the same as that of the gas inlet groove, so as to form the gas inlet groove at one time.
Preferably, in the processing device for the air inlet groove of the profile of the integral impeller shroud, the profile of the integral impeller shroud is a coated profile of the integral impeller shroud.
The invention provides a processing device of an integral impeller outer cover profile air inlet groove. The positioning fixture comprises a positioning dividing plate and a clamping body coaxially and rotatably connected with the dividing plate, wherein the dividing plate is used for being fixedly connected with a machined part, positioning holes are respectively and correspondingly formed in the dividing plate corresponding to air inlet grooves of the machined part, positioning through holes matched with the positioning holes are formed in the clamping body, the positioning fixture also comprises positioning pins and locking parts, the positioning pins are used for being inserted into the positioning through holes and the positioning holes so as to limit the dividing plate and the clamping body, and the locking parts are used for fixing the dividing plate and the clamping body; the formed electrode is used for processing the positioning groove.
When the machining device of the integral impeller outer cover profile air inlet groove provided by the invention is used for machining the air inlet groove, firstly, a machining part is arranged on the machining device; then, the indexing disc and the machining part are rotated until the position of the air inlet groove to be machined corresponds to the position of the formed electrode, the positioning pin is inserted into the positioning through hole and the positioning hole, and then the indexing disc is fixed with the clamping body; then, forming an air inlet groove by adopting a forming electrode through electric spark machining; then the fixing of the dividing plate and the clamping body is released, and the positioning pin is pulled out; and repeating the steps until all the air inlet grooves to be processed are processed. By adopting the processing device, the problem that the profile of the outer cover of the integral impeller which cannot be processed by a numerical milling machine enters the air inlet groove can be solved by electric spark processing. And the angular position of the air inlet groove is controlled by the positioning hole and the index plate in the machining process, so that the operation is convenient, the preparation time is short, the machining efficiency is improved, and the machining error is avoided.
In order to achieve the second object, the present invention further provides a method for machining an air inlet groove of an integral impeller shroud profile, wherein the method for machining the air inlet groove of the integral impeller shroud profile adopts any one of the machining devices, and comprises the following steps:
s1: mounting the machined part on the machining device;
s2: rotating the index plate until the position of the air inlet groove to be processed corresponds to the position of the forming electrode;
s3: after the positioning pin is inserted into the positioning through hole and the positioning hole, the dividing disc is fixed with the clamping body;
s4: forming the air inlet groove by adopting a forming electrode through electric spark machining;
s5: the fixing of the index plate and the clamping body is released, and the positioning pin is pulled out;
s6: repeating the steps S2 to S5 until all the air inlet grooves to be machined are machined.
Because the processing device has the technical effects, the processing method of the profile air inlet groove of the integral impeller housing by adopting the processing device also has corresponding technical effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a processing apparatus according to an embodiment of the present invention;
FIG. 2 is a partially enlarged view of the portion I in FIG. 1;
FIG. 3 is a schematic view of a shaped electrode;
fig. 4 is a schematic view of the machining part of the air inlet groove.
The drawings are numbered as follows:
the clamping device comprises a clamping body 1, a handle 2, a handle 3, an index plate 4, a positioning plate 5, a processing part 6, a tensioning plate 7, a cylindrical pin 8, an angular pressing block 9, a gasket 10, a positioning pin body 11, a guide sleeve 12, a compression spring 13, a pull rod 14 and a screw rod 15.
Detailed Description
The embodiment of the invention discloses a device and a method for machining an integral impeller housing profile air inlet groove, which aim to improve the machining efficiency of the integral impeller housing profile air inlet groove.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-4, fig. 1 is a schematic cross-sectional view of a processing apparatus according to an embodiment of the invention; FIG. 2 is an enlarged view of a portion I of FIG. 1; FIG. 3 is a schematic view of a shaped electrode; fig. 4 is a schematic view of the machining part of the air inlet groove.
The invention provides a processing device of an integral impeller outer cover profile air inlet groove.
The positioning fixture comprises a positioning index plate 4 and a clamping body 1 which is coaxially and rotatably connected with the index plate 4. The dividing plate 4 is used for being fixedly connected with the processing part 6, and specifically can be directly and fixedly connected with the processing part 6, and also can be indirectly connected with the processing part 6 through other connecting pieces. The index plate 4 is rotatably connected with the clamping body 1, and can be specifically realized through a sleeving structure, a shared rotating shaft or a bearing and the like, and the specific limitation is not provided here.
The indexing plate 4 is provided with positioning holes corresponding to the air inlet grooves of the machined part 6, and when the number of the air inlet grooves is six, the indexing plate 4 is provided with 6 positioning holes according to the corresponding angular positions of the 6 air inlet grooves. Because graduated disk 4 and processing part 6 fixed connection, when the relative clamping body 1 of graduated disk 4 rotated, drive processing part 6 and rotate relative clamping body 1 in the lump to make processing part 6 rotate to corresponding air inlet duct processing department.
The clamping body 1 is provided with positioning through holes matched with the positioning holes, namely the clamping body 1 is provided with one positioning through hole, and the indexing disc 4 is rotated to the corresponding positioning hole to be opposite to the positioning through hole so as to realize the positioning of the indexing disc 4 and the clamping body 1, namely the angular positioning of the machined part 6.
The locating pin is used for inserting positioning hole and locating hole in order to be spacing with graduated disk 4 and clamping body 1, just also rotates graduated disk 4 to corresponding locating hole and positioning hole relative time, through inserting the locating pin, then graduated disk 4 can not rotate relative clamping body 1 again, realizes the spacing of the two, and then realizes that the angle of processing part 6 is spacing.
The locking component is used for fixing the dividing plate 4 and the clamping body 1, namely after the dividing plate 4 and the clamping body 1 are limited by the positioning pin, the dividing plate 4 and the clamping body 1 are further fixed by the locking component, so that the fixing of the processing part 6 and the clamping body 1 is realized, and the follow-up electric spark processing is facilitated.
And the formed electrode is used for processing the positioning groove. The specific structure and working principle of the forming electrode used for forming the air outlet and inlet slots by electric spark refer to the arrangement of the conventional forming electrode, which is not described herein again.
When the air inlet groove is machined by applying the machining device for the profile air inlet groove of the integral impeller outer cover, firstly, a machining part 6 is arranged on the machining device; then, the dividing plate 4 with the machining part 6 is rotated until the position of the air inlet groove to be machined corresponds to the position of the formed electrode, positioning pins are inserted into the positioning through holes and the positioning holes, and then the dividing plate 4 and the clamping body 1 are fixed; then, forming an air inlet groove by adopting a forming electrode through electric spark machining; then the fixing of the index plate 4 and the clamping body 1 is released, and the positioning pin is pulled out; and repeating the steps until all the air inlet grooves to be processed are processed. By adopting the processing device, the problem that the profile of the outer cover of the integral impeller, which cannot be processed by a numerical milling machine, enters the air inlet groove can be solved by electric spark processing. And the angular position of the air inlet groove is controlled by the positioning hole and the index plate 4 in the machining process, so that the operation is convenient, the preparation time is short, the machining efficiency is improved, and the machining error is avoided.
In one embodiment, the locating pin is embodied as a screwable locating pin. As shown in fig. 2, a guide sleeve 12 is arranged in the positioning through hole of the clamping body 1, the positioning pin includes a positioning pin body 11, one end of the positioning pin body 11 is embedded in the handle 3, a compression spring 13 is arranged in cooperation with the positioning pin body 11, and the positioning pin body 11 falls into the positioning hole on the dividing plate 4 under the spring force of the compression spring 13, so that the dividing plate 4 and the clamping body 1 are circumferentially positioned, and the angular positioning of the part is realized. Namely, the locating pin body 11 is limited on the clamping body 1 through the compression spring 13 and the guide sleeve 12. When the index plate 4 needs to be rotated, the handle 3 is pulled out, so that the positioning pin body 11 is lower than the contact surface of the index plate 4 and the clamping body 1, namely the positioning pin body 11 exits from the positioning hole of the index plate 4, and the index plate 4 is rotated to the corresponding processing position.
The handle 3 may be a knurled handle 3, that is, the surface of the handle 3 has knurling to increase the friction for the operation of the processing personnel. The compression spring 13 may be embodied as a cylindrical helical compression spring.
Specifically, the positioning fixture further comprises a positioning disc 5, the positioning disc 5 is used for being fixedly connected with a machining part 6, and the positioning disc 5 is fixedly connected with the dividing disc 4. Namely, the positioning fixture is fixedly connected with the processing part 6 through the positioning disc 5. The specific structure of the positioning plate 5 can be set according to the shape of the machined part 6, and is not limited in detail here. Specifically, the positioning disk 5 is fixed on the positioning disk 5 through an angular pressing block 9.
Specifically, the positioning disc 5 is fixedly connected with the indexing disc 4 through a cylindrical pin 8. The cylindric lock 8 is connected, simple structure, can be in maintenance and convenient dismantlement under the circumstances of needs. Of course, the positioning plate 5 and the indexing plate 4 are not limited to the cylindrical pin 8, and may be connected by other conventional fixing means such as bolts.
Further, the positioning plate 5 is fixedly connected with the machining part 6 through an angle pin and a compression screw. The processing part 6 can be conveniently fixed on the positioning disc 5 through the angle pin and the compression screw, and the connection is reliable. After the processing is finished, the disassembly can be convenient. Of course, the fixing manner of the positioning plate 5 and the machining part 6 is not limited to the angle pin and the compression screw, and other conventional fixing connection manners can be adopted as required.
In the above embodiment, the locking component is a tightening handle, and the tightening handle rotates to press and fix the dividing plate 4 and the clamping body 1. That is to say, the rotation of screwing up the handle, can convert the effort that compresses tightly graduated disk 4 and clamping body 1 to can realize the locking that compresses tightly graduated disk 4 and clamping body 1 through acting on the handle of screwing up.
Specifically, the center of clamping body 1 has the pivot, the center of graduated disk 4 has the mounting hole, the pivot is inserted in the mounting hole, so that graduated disk 4 can revolute the rotation of axes, it includes handle 2 to screw up the handle, screw rod 15 with 2 fixed connection of handle, with screw rod 15 screw-thread fit's taut disk 7 and with taut disk 7 complex pull rod 14, taut disk 7 is located one side that clamping body 1 deviates from graduated disk 4, pull rod 14 passes epaxial through-hole in commentaries on classics, and the one end of pull rod 14 has the flange and offsets with graduated disk 4, the other end and taut disk 7 cooperation, drive taut disk 7 taut pull rod 14 of taut disk when screw rod 15 rotates, make graduated disk 4 and clamping body 1 lock, drive taut disk 7 during screw rod 15 counter-rotation and loosen pull rod 14. Specifically, the pull rod 14 penetrates through the clamping body 1, a boss is arranged at the end of the pull rod, the screw rod 15 drives the tensioning disc 7 to move linearly when rotating, so that the pull rod 14 is abutted to the boss of the pull rod 14 and tensioned, and the flange at one end of the pull rod 14 compresses the dividing disc 4 on the clamping body 1.
That is to say when rotating handle 2, the screw rod 15 with handle 2 fixed connection rotates in step, and the rotation of screw rod 15 drives the take-up pulley 7 linear motion of screw-thread fit with it, and take-up pulley 7 cooperates with pull rod 14 to press from both sides tightly or loosen graduated disk 4 and clamping body 1. And the pull rod 14 is arranged on the rotating shaft of the clamping body 1, so that when the handle is screwed down and loosened, the rotation of the index plate 4 relative to the clamping body 1 is not influenced.
Furthermore, a washer 10 is arranged between the flange of the pull rod 14 and the indexing disc 4, when the screw 15 rotates to drive the tightening disc 7 to tighten the pull rod 14, the pull rod 14 compresses the washer 10, and the tightening of the washer 10 locks the indexing disc 4 and the clamping body 1.
According to the requirement, the locking component can also adopt a component which can be used for detachably and fixedly connecting the clamping body 1 and the dividing plate 4 by the conventional methods such as a lock catch and the like.
On the basis of the above embodiments, the size of the molded electrode is consistent with that of the air inlet groove, so that the air inlet groove is molded in one step. As shown in fig. 2 and fig. 3, the air inlet groove can be formed by one-time electric spark machining by using the forming electrode with the size consistent with that of the air inlet groove, reciprocating machining is not needed to be carried out left and right, the machining time of the air inlet groove is greatly shortened, and the machining quality is ensured.
Based on the processing device provided in the above embodiment, the present invention further provides a processing method for the whole impeller shroud profile air inlet groove, the processing method for the whole impeller shroud profile air inlet groove adopts any one of the processing devices in the above embodiments, and the processing method includes the following steps:
s1: mounting the processing part on a processing device;
s2: rotating the index plate until the position of the air inlet groove to be processed corresponds to the position of the forming electrode;
s3: after the positioning pin is inserted into the positioning through hole and the positioning hole, the dividing plate is fixed with the clamping body;
s4: forming an air inlet groove by adopting a forming electrode electric spark machining;
s5: the fixing of the index plate and the clamping body is released, and the positioning pin is pulled out;
s6: and repeating the steps S2 to S5 until all the air inlet grooves to be machined are machined.
Because the processing method of the air inlet groove of the profile of the integral impeller shroud adopts the processing device in the above embodiment, please refer to the above embodiment for the beneficial effects of the processing method of the air inlet groove of the profile of the integral impeller shroud.
When the positioning fixture includes a positioning plate, step S1 may specifically include: the processing part is fixed on the positioning disc through an angular pin and a compression screw; the positioning disc and the dividing disc are fixed through cylindrical pins.
When locking part includes the tightening handle, then fixed specific including of graduated disk and clamping body: the processing part with the well-defined angle is fixed on the clamping body by screwing the handle. Step S5 specifically includes: screwing out a screwing handle in the positioning clamp, and then pulling out the positioning pin. Then the indexing disc and the part are rotated to the next air inlet groove processing position, and the taken positioning pin is inserted into the positioning hole corresponding to the air inlet groove; and finally, screwing down the screwing handle, and processing after fixing the parts. When six air inlet grooves are formed, the steps are repeated for 6 times, and then all the air inlet grooves of the profile of the integral impeller outer cover can be machined.
Under the condition that the screwing handle adopts the structure comprising the handle, the tensioning disc and the like, when the handle is machined, the handle is pulled out, so that the positioning pin body is lower than the contact surface of the dividing disc and the clamping body, and meanwhile, when the dividing disc is rotated to a first machining position, the positioning pin body falls into the positioning hole in the dividing disc under the action of the spring force of the compression spring, so that the angular positioning of the part is realized; and finally, screwing the handle, driving the tensioning disc to tension the pull rod downwards through the screw rod, compressing the gasket by the other end of the pull rod, and locking the dividing disc and the clamping body by the compression of the gasket to finally realize the fixed processing of the part.
After an air inlet groove is machined, the handle is loosened, the indexing disc and the clamping body are in a loosening state, the handle is pulled out, the positioning pin body is lower than the contact surface of the indexing disc and the clamping body, the indexing disc is rotated to a second machining position, the positioning pin body falls into a second positioning hole in the indexing disc under the action of the spring force of the compression spring, and then the handle is screwed again, so that the indexing disc and the clamping body are locked, and the air inlet groove at the second position is machined. Repeating the steps for 6 times to complete the whole processing of the profile air inlet groove with the coating on the outer cover of the integral impeller.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The utility model provides a processingequipment of whole impeller shroud profile air inlet duct which characterized in that includes:
the positioning fixture comprises a positioning indexing disc and a clamping body coaxially and rotatably connected with the indexing disc, wherein the indexing disc is used for being fixedly connected with a machined part, positioning holes are respectively and correspondingly formed in the indexing disc corresponding to the air inlet grooves of the machined part, positioning through holes matched with the positioning holes are formed in the clamping body, the positioning fixture further comprises positioning pins and a locking part, the positioning pins are used for being inserted into the positioning through holes and the positioning holes so as to limit the indexing disc and the clamping body, and the locking part is used for fixing the indexing disc and the clamping body;
the forming electrode is used for processing the positioning groove, and the size of the forming electrode is consistent with that of the air inlet groove so as to form the air inlet groove in one step;
the locking part is a tightening handle, the tightening handle rotates to enable the dividing plate to be tightly pressed and fixed with the clamping body, the center of the clamping body is provided with a rotating shaft, the center of the dividing plate is provided with a mounting hole, the rotating shaft is inserted into the mounting hole so as to enable the dividing plate to rotate around the rotating shaft, the tightening handle comprises a handle, a screw fixedly connected with the handle, a tensioning plate in threaded fit with the screw and a pull rod in fit with the tensioning plate, the tensioning plate is positioned on one side of the clamping body, which is far away from the dividing plate, the pull rod penetrates through a through hole in the rotating shaft and is parallel to the axis of the rotating shaft, one end of the pull rod is provided with a flange and abuts against the dividing plate, the other end of the pull rod is matched with the tensioning plate, one end of the pull rod, which is matched with the tensioning plate, penetrates through the clamping body, and the end part of the pull rod is provided with a boss which abuts against the tensioning plate, when the screw rod rotates, the tensioning disc is driven to tension the pull rod, so that the dividing disc and the clamping body are locked.
2. The machining device according to claim 1, wherein the positioning fixture further comprises a positioning plate, the positioning plate is used for being fixedly connected with a machined part, and the positioning plate is fixedly connected with the dividing plate.
3. A processing apparatus as claimed in claim 2, wherein the positioning plate is fixedly connected to the indexing plate by a cylindrical pin.
4. The machining device according to claim 2, characterized in that the positioning plate is fixedly connected with the machined part through an angle pin and a compression screw.
5. A processing apparatus as claimed in any of claims 1 to 4, wherein the integral impeller shroud profile is an integral impeller shroud coated profile.
6. A method for machining an air inlet groove of a profile of an integral impeller housing, wherein the machining device according to any one of claims 1 to 5 is adopted, and the method comprises the following steps:
s1: mounting the machined part on the machining device;
s2: rotating the index plate until the position of the air inlet groove to be processed corresponds to the position of the forming electrode;
s3: after the positioning pin is inserted into the positioning through hole and the positioning hole, the dividing plate is fixed with the clamping body;
s4: forming the air inlet groove by adopting a forming electrode through electric spark machining;
s5: the fixing of the index plate and the clamping body is released, and the positioning pin is pulled out;
s6: repeating the steps S2 to S5 until all the air inlet grooves to be machined are machined.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010657593.4A CN111673216B (en) | 2020-07-09 | 2020-07-09 | Machining device and machining method for profile air inlet groove of integral impeller outer cover |
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| CN202010657593.4A CN111673216B (en) | 2020-07-09 | 2020-07-09 | Machining device and machining method for profile air inlet groove of integral impeller outer cover |
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| CN111673216A CN111673216A (en) | 2020-09-18 |
| CN111673216B true CN111673216B (en) | 2022-07-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB623726A (en) * | 1945-09-14 | 1949-05-23 | Thomas Aubrey Kestell | Improvements in locating and locking means |
| CN202462003U (en) * | 2011-12-30 | 2012-10-03 | 成都发动机（集团）有限公司 | Fixture for circumferentially processing evenly-distributed chutes on disk-type workpieces |
| CN202922335U (en) * | 2012-11-28 | 2013-05-08 | 南京工业职业技术学院 | Indexing milling jig |
| CN204308617U (en) * | 2014-12-03 | 2015-05-06 | 重庆红旗缸盖制造有限公司 | End cap groove milling clamp system |
| CN105171158B (en) * | 2015-10-10 | 2017-11-14 | 贵阳中航动力精密铸造有限公司 | A kind of turborotor taper air film hole processing technology |
| CN105414690B (en) * | 2015-12-04 | 2018-01-12 | 中国南方航空工业(集团)有限公司 | Upside-down mounting indexing fixture and the electric discharge machining method based on it |
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