CN115319503B - Clamp for improving position degree of open groove in sealing ring and use method - Google Patents
Clamp for improving position degree of open groove in sealing ring and use method Download PDFInfo
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- CN115319503B CN115319503B CN202211062755.5A CN202211062755A CN115319503B CN 115319503 B CN115319503 B CN 115319503B CN 202211062755 A CN202211062755 A CN 202211062755A CN 115319503 B CN115319503 B CN 115319503B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a clamp for improving the position degree of an opening groove in an air sealing ring and a use method thereof, the clamp comprises a base, wherein a compressing and positioning unit and a tool setting angle positioning unit are connected to the base, the lower end of the base is connected with a rotation locking unit, the compressing and positioning unit is connected to the upper end of the base and is used for compressing a part to be processed, and the tool setting angle positioning unit is fixed on one side of the compressing and positioning unit.
Description
Technical Field
The invention relates to the technical field of production of aeroengine sealing rings, in particular to a clamp for improving the position degree of an open slot in a sealing ring and a use method thereof.
Background
In the field of aeroengines, an air sealing ring is an important component in an aeroengine air sealing ring component, the material of the air sealing ring is high-temperature alloy, the integrity of a processing surface of the air sealing ring has very important effect on the performance of the air sealing ring due to the complex working environment, the air sealing ring is simple in structure, but the accuracy requirement on the relative positioning hole position of an open slot is strict, and the open slot and the positioning hole position are required to be positioned on the same straight line and point to the circle center. If the directions of the open slot and the positioning hole are inconsistent, cracks and even the sealing ring metal block fall easily occur at the open slot and the positioning hole in the running process of the engine. At present, the company adopts a universal milling machine to process, the side edge is fixed in an angle direction, and the transverse sheet is milled, so that the direction of an open slot is inconsistent with the direction of a positioning hole, the product qualification rate is lower, and the flying potential safety hazard is easy to generate.
Disclosure of Invention
The invention aims to provide a clamp for improving the position degree of an open slot in an air sealing ring and a use method thereof, which are used for solving the defect that the direction of the open slot is inconsistent with that of a positioning hole in the milling process of the existing air sealing ring, ensuring the processing precision of the open slot and improving the product percent of pass.
The invention provides the following technical scheme: the utility model provides an improve anchor clamps of open slot position degree in sealing ring, includes the base, be connected with on the base and compress tightly positioning unit and tool setting angular orientation positioning unit, the lower extreme of base is connected with rotates locking unit, compress tightly the positioning unit and connect the upper end at the base for compress tightly the part of waiting to process, the tool setting angular orientation positioning unit is fixed in one side that compresses tightly the positioning unit, is used for the angular orientation of location part of waiting to process, it is used for compressing tightly the positioning unit to turn to fixed, when conveniently rotating the locking unit and loosening, manual rotation compresses tightly the angular orientation of positioning unit adjustment part of waiting to process.
According to the technical scheme, compress tightly positioning unit includes retainer plate and axle, the sinkage has been seted up at the center of retainer plate, the through-hole has been seted up to the bottom of sinkage, base internal fixation has the spacer sleeve, the spacer sleeve passes through the axle clearance fit with on the base and is connected, the screw hole has been seted up to the upper end of axle, the upper end of axle has locking screw to compress tightly the top board on the axle through threaded connection, and the upper end of top board is located the retainer plate top, place between top board and the retainer plate and wait to process the part, a locating hole has been seted up on the flange edge of axle, and locating hole downwardly extending shaping is in the bottom of retainer plate, makes axle and retainer plate rotate simultaneously through inserting the locating pin in the locating hole.
According to the technical scheme, the upper pressing plate comprises a circular ring, two claw pressing plates are formed above the circular ring in a slant mode, notches are formed in the circular ring, and the claw pressing plates are symmetrically distributed with the notches as centers.
According to the technical scheme, the outer surface of the positioning ring is provided with the slotted hole for removing cutting fluid and scrap iron, and the bottom surface of the slotted hole is flush with the bottom surface of the sinking groove.
According to the technical scheme, tool setting angular positioning unit includes the guide block, offer on the base with guide block clearance fit's slot, the guide block inserts in the slot, spacing hole and guide hole have been seted up to the side of guide block, spacing hole internal fixation has the cylindric lock to carry out spacing from top to bottom to the guide block, guide hole internal fixation has the bush, and it has the guide arm to slide in the bush, evenly seted up angular hole on the locating ring, the guide arm passes the bush and inserts in the angular hole of waiting to process the part simultaneously insert in the angular hole on the locating ring.
According to the technical scheme, the upper end of the guide block is provided with the tool setting groove.
According to the technical scheme, rotate locking element includes the holding down plate, the lower extreme shaping of base has the recess, and the holding down plate embedding is in the recess, the lower extreme shaping connecting hole of holding down plate, connecting hole and axle clearance fit have cup jointed the sphere packing ring on the lower extreme of axle, the lower extreme of sphere packing ring has the bottom nut at epaxial threaded connection, and the shaping has the circular cone groove on the surface of connecting hole, and the sphere packing ring gomphosis is in the circular cone inslot, the locking hole has been seted up in the both ends top of holding down plate on the base, is fixed with hexagon nut on the locking hole of one end, and hexagon nut internal thread connection has the flat end screw of screwing down, the locking hole internal thread connection compression screw of the other end.
According to the technical scheme, the rectangular groove is further formed in the lower end of the base, the positioning key is connected in the rectangular groove through the fastener, and the U-shaped groove is formed in the two ends of the base.
The invention also provides the following technical scheme: the application method of the clamp for improving the position degree of the open groove in the sealing ring comprises the following steps:
step one, fixing a clamp on a workbench of a milling machine;
secondly, placing and compacting the part to be processed on a locking and positioning unit;
step three, carrying out angular positioning and tool setting on the part to be processed by a tool setting angular positioning unit, locking a rotation locking unit, then extracting an angular positioning hole from a guide rod, extracting the tool setting angular positioning unit from a base, and carrying out milling of a notch;
and fourthly, loosening the rotary locking unit, releasing the angular positioning, rotating the compacting positioning unit until the next angular position, carrying out angular positioning by the tool setting angular positioning unit again, screwing the rotary locking unit, fixing the compacting positioning unit, then drawing the guide rod out of the angular positioning hole and drawing the tool setting angular positioning unit out of the base, carrying out next milling, and repeating the fourth step until all the open grooves are finished.
Compared with the prior art, the invention has the following beneficial effects: through adopting the location processing mode that decides the angle to be unanimous with milling direction, the guide arm is used again to fix a position the sealing ring to through set screw, realize locking the holistic locking and rotation of locating element, thereby conveniently rotate the position of sealing ring, make the position adjustment to milling cutter department with the open slot convenient, improved machining efficiency, and set up the notch that corresponds with sealing ring on the locating ring, during the processing, sealing ring aligns with the notch of locating ring, thereby improved machining precision.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the overall structure of the present invention;
FIG. 3 is a schematic top view of the overall structure of the present invention;
FIG. 4 is a schematic view of the structure of the retainer ring of the present invention;
FIG. 5 is a schematic cross-sectional view of an upper platen of the present invention;
FIG. 6 is a schematic top view of the structure of the upper platen of the present invention;
FIG. 7 is a schematic view of the structure of the guide block of the present invention;
FIG. 8 is a schematic top view of the structure of the base of the present invention;
FIG. 9 is a schematic cross-sectional view of the lower platen of the present invention;
in the figure: 1. an upper press plate; 101. a circular ring; 102. a claw pressing plate; 103. a notch; 2. a positioning ring; 201. a sinking groove; 202. a through hole; 203. slotted holes; 3. a locking screw; 4. a shaft; 401. positioning holes; 5. a positioning pin; 6. tightening a screw at the flat end; 7. a hexagonal nut; 8. a base; 801. a slot; 802. a groove; 803. rectangular grooves; 9. a guide block; 901. a limiting hole; 902. a guide hole; 10. a bushing; 11. a guide rod; 12. a positioning sleeve; 13. a lower pressing plate; 131. a connection hole; 132. a conical groove; 14. a spherical washer; 15. a bottom nut; 17. a positioning key; 18. a cylindrical pin; 19. and (5) pressing the screw.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1 to 3, the present invention provides the following technical solutions: the utility model provides an improve anchor clamps of open slot position degree in sealing ring, including base 8, be connected with on the base 8 and compress tightly positioning unit and tool setting angular positioning unit, the lower extreme of base 8 is connected with and rotates the locking unit, compress tightly the positioning unit and connect in the upper end of base 8, be used for compressing tightly the part of waiting to process, the tool setting angular positioning unit is fixed in one side of compressing tightly the positioning unit, be used for the angular orientation of location part of waiting to process, rotate the locking unit and be used for compressing tightly the positioning unit and turn to fixed, when convenient rotation locking unit loosen, manual rotation compresses tightly the positioning unit adjustment part of waiting to process's angular orientation, firstly will wait to process the part centre gripping fixed through compressing tightly the positioning unit, reuse tool setting angular positioning unit, carry out angular positioning and will rotate the locking unit locking and will compress tightly the positioning unit and fix, then mill the open slot of processing the sealing ring, will rotate the locking unit and loosen, compress tightly the positioning unit like this and can integrally rotate the part of waiting to process to the next angular orientation, again will rotate the locking unit, carry out milling.
As shown in fig. 1 to 4, the compressing and positioning unit comprises a positioning ring 2 and a shaft 4, a sinking groove 201 is formed in the center of the positioning ring 2, a through hole 202 is formed in the bottom of the sinking groove 201, a positioning sleeve 12 is fixed in a base 8, the positioning ring 2 is connected with the positioning sleeve 12 on the base 8 through clearance fit of the shaft 4, a threaded hole is formed in the upper end of the shaft 4, a locking screw 3 is connected with the upper end of the shaft 4 through threads to compress an upper pressing plate 1 on the shaft 4, the upper end of the upper pressing plate 1 is located above the positioning ring 2, a part to be processed is placed between the upper pressing plate 1 and the positioning ring 2, a positioning hole 401 is formed in the flange edge of the shaft 4, the positioning hole 401 extends downwards to be formed in the bottom of the positioning ring 2, the shaft 4 and the positioning ring 2 are simultaneously rotated by inserting a positioning pin 5 in the positioning hole 401, and the distance between the upper pressing plate 1 and the locking screw 3 is controlled through rotation of the locking screw 3, so that the part to be processed is fixed on the positioning ring 2.
As shown in fig. 5 and 6, the upper pressing plate 1 includes a circular ring 101, at least two claw pressing plates 102 are formed obliquely upward on the circular ring 101, notches 103 are formed in the circular ring 101, the claw pressing plates 102 are symmetrically distributed with the notches 103 as the center, the claw pressing plates 102 can press on the positioning ring 2, and the sealing ring is fixed on the positioning ring 2.
The outer surface of the positioning ring 2 is provided with a slotted hole 203 for removing cutting fluid and scrap iron, the bottom surface of the slotted hole 203 is flush with the bottom surface of the sinking groove 201, and the cutting fluid can flow out of the slotted hole 203 in the sinking groove 201.
As shown in fig. 7, the tool setting angular positioning unit comprises a guide block 9, a slot 801 in clearance fit with the guide block 9 is formed in a base 8, the guide block 9 is inserted into the slot 801, a limit hole 901 and a guide hole 902 are formed in the side surface of the guide block 9, a cylindrical pin 18 is fixed in the limit hole 901 to limit the guide block 9 up and down, a bushing 10 is fixed in the guide hole 902, a guide rod 11 slides in the bushing 10, angular holes are uniformly formed in a positioning ring 2, the guide rod 11 is inserted into the angular holes of a part to be machined and simultaneously inserted into the angular holes in the positioning ring 2 through the bushing 10, and the guide rod 11 is inserted into the angular holes in the part to be machined and the positioning ring 2 through the sliding of the guide rod 11, so that the machining position of the part to be machined is aligned with the angular holes in the positioning ring 2, and the machining precision of the part to be machined is improved.
The upper end of the guide block 9 is provided with a tool setting groove, which is convenient for tool setting.
As shown in fig. 1, 2 and 9, the rotation locking unit includes holding down plate 13, the lower extreme shaping of base 8 has recess 802, holding down plate 13 imbeds in recess 802, holding down plate 13's lower extreme shaping connecting hole 131, connecting hole 131 and axle 4 clearance fit, spherical packing ring 14 has been cup jointed on the lower extreme of axle 4, the lower extreme of spherical packing ring 14 has bottom nut 15 on axle 4 threaded connection, the shaping has conical groove 132 on the surface of connecting hole 131, spherical packing ring 14 gomphosis is in conical groove 132, the holding down plate 13 has been seted up on the base 8 in the both ends top of holding down plate 13, be fixed with hexagon nut 7 on the holding down hole of one end, hexagon nut 7 internal thread connection has flat end screw 6, holding down plate 13's in threaded connection clamp screw 19 in the holding down plate, through the rotation of clamp screw 19, the horizontality of holding down plate 13 is kept level, there is the space between holding down plate 13, axle 4 and the spherical packing ring 14, thereby make the positioning unit can rotate, the angular position of the rotation positioning ring adjustment spare part, when clamp down plate 19 makes down plate 13 slope, the spherical packing ring 14 and the axial packing ring 14 can not take place, thereby the axial packing ring 14 is compressed together, the axial packing ring 14 is compressed together with the rotation between the zero-down plate 14, the position spare part is can be further fixed, the friction between the positioning unit is compressed down plate 14, and the position between the axis 14 is compressed down plate is compressed tightly, and the position 4.
As shown in fig. 8, the lower end of the base 8 is further provided with a rectangular groove 803 with a through length, the rectangular groove 803 is connected with positioning keys 17 through fasteners, two ends of the base 8 are provided with U-shaped grooves, the base 8 is conveniently and fixedly mounted on a milling machine through the positioning keys 17, and meanwhile, the U-shaped grooves can conveniently fix the base 8 on a working table of the milling machine through a clamp.
The invention also provides a technical scheme that: the application method of the clamp for improving the position degree of the open groove in the sealing ring comprises the following steps:
step one, fixing a clamp on a workbench of a milling machine;
secondly, placing and compacting the part to be processed on a compacting and positioning unit;
step three, carrying out angular positioning and tool setting on the part to be processed by a tool setting angular positioning unit, locking a rotation locking unit, then extracting an angular positioning hole from a guide rod 11, extracting the tool setting angular positioning unit from a base 8, and carrying out milling of a notch;
and fourthly, loosening the rotary locking unit, releasing the angular positioning, rotating the compacting positioning unit until the next angular position, carrying out angular positioning by the tool setting angular positioning unit again, screwing the rotary locking unit again, fixing the compacting positioning unit, then drawing out the guiding rod 11 from the angular positioning hole, extracting the tool setting angular positioning unit from the base, carrying out next milling processing, and repeating the fourth step until all the open grooves are processed.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides an improve anchor clamps of open slot position degree in sealing ring, includes the base, be connected with on the base and compress tightly positioning unit and tool setting angular positioning unit, the lower extreme of base is connected with and rotates locking unit, its characterized in that: the pressing and positioning unit is connected to the upper end of the base and used for pressing the part to be processed, the tool setting angular positioning unit is fixed on one side of the pressing and positioning unit and used for positioning the angular direction of the part to be processed, and the rotation locking unit is used for fixing the turning direction of the pressing and positioning unit, so that when the rotation locking unit is convenient to loosen, the pressing and positioning unit is manually rotated to adjust the angular direction of the part to be processed;
the pressing and positioning unit comprises a positioning ring and a shaft, wherein a sinking groove is formed in the center of the positioning ring, a through hole is formed in the bottom of the sinking groove, a positioning sleeve is fixed in the base, the positioning ring is connected with the positioning sleeve on the base through shaft clearance fit, the shaft penetrates through the positioning ring and is in clearance fit with the positioning sleeve, a threaded hole is formed in the upper end of the shaft, the upper end of the shaft is connected with a locking screw through threads to press an upper pressing plate on the shaft, the upper end of the upper pressing plate is located above the positioning ring, a part to be processed is placed between the upper pressing plate and the positioning ring, a positioning hole is formed in the flange edge of the shaft, the positioning hole extends downwards to be formed in the bottom of the positioning ring, and the shaft and the positioning ring rotate simultaneously through inserting a positioning pin into the positioning hole;
the tool setting angular positioning unit comprises a guide block, a slot which is in clearance fit with the guide block is formed in the base, the guide block is inserted into the slot, a limiting hole and a guide hole are formed in the side face of the guide block, a cylindrical pin is fixed in the limiting hole to limit the guide block up and down, a bushing is fixed in the guide hole, a guide rod slides in the bushing, angular holes are uniformly formed in the positioning ring, the guide rod penetrates through the bushing to be inserted into the angular holes of a part to be processed and is simultaneously inserted into the angular holes of the positioning ring, and a tool setting groove is formed in the upper end of the guide block;
the rotation locking unit comprises a lower pressing plate, the lower extreme shaping of base has a recess, and the lower pressing plate embedding is in the recess, the lower extreme shaping connecting hole of lower pressing plate, connecting hole and axle clearance fit have cup jointed the sphere packing ring on the lower extreme of axle, the lower extreme of sphere packing ring has bottom nut at epaxial threaded connection, and the shaping has the circular cone groove on the surface of connecting hole, and sphere packing ring gomphosis is in the circular cone inslot, the locking hole has been seted up in the both ends top of lower pressing plate on the base, is fixed with hexagon nut on the locking hole of one end, and hexagon nut internal thread connection has the flat end screw down, and the locking hole internal thread connection hold-down screw of the other end.
2. The fixture for improving the position of an open slot in an air sealing ring according to claim 1, wherein: the upper pressing plate comprises a circular ring, two claw pressing plates are formed obliquely above the circular ring, notches are formed in the circular ring, and the claw pressing plates are symmetrically distributed with the notches as centers.
3. The fixture for improving the position of an open slot in an air sealing ring according to claim 1, wherein: the outer surface of the positioning ring is provided with a slotted hole for removing cutting fluid and scrap iron, and the bottom surface of the slotted hole is flush with the bottom surface of the sinking groove.
4. The fixture for improving the position of an open slot in an air sealing ring according to claim 1, wherein: rectangular grooves are further formed in the lower end of the base, positioning keys are connected in the rectangular grooves through fasteners, and U-shaped grooves are formed in the two ends of the base.
5. The application method of the clamp for improving the position degree of the open slot in the sealing ring is characterized by comprising the following steps of: a clamp comprising the claims 1 to 4, the method of use being as follows:
step one, fixing a clamp on a workbench of a milling machine;
secondly, placing and compacting the part to be processed on a locking and positioning unit;
step three, carrying out angular positioning and tool setting on the part to be processed by a tool setting angular positioning unit, locking a rotation locking unit, then extracting an angular positioning hole from a guide rod, extracting the tool setting angular positioning unit from a base, and carrying out milling of a notch;
and fourthly, loosening the rotary locking unit, rotating to compress the positioning unit to the next angular direction, performing angular positioning and tool setting by the tool setting angular positioning unit again, screwing the rotary locking unit again, fixing the compressing positioning unit, then drawing the guide rod out of the angular positioning hole and drawing the tool setting angular positioning unit out of the base, performing the next milling, and repeating the fourth step until all the open grooves are finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211062755.5A CN115319503B (en) | 2022-08-31 | 2022-08-31 | Clamp for improving position degree of open groove in sealing ring and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211062755.5A CN115319503B (en) | 2022-08-31 | 2022-08-31 | Clamp for improving position degree of open groove in sealing ring and use method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115319503A CN115319503A (en) | 2022-11-11 |
| CN115319503B true CN115319503B (en) | 2023-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211062755.5A Active CN115319503B (en) | 2022-08-31 | 2022-08-31 | Clamp for improving position degree of open groove in sealing ring and use method |
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| CN (1) | CN115319503B (en) |
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| BE787611A (en) * | 1971-08-16 | 1973-02-16 | Monsanto Co | CONTINUOUS POLYMERIZATION UNIT |
| CN202804702U (en) * | 2012-09-07 | 2013-03-20 | 内江神舟机电设备有限公司 | Locating fixture for processing driven bevel gear |
| CN207087367U (en) * | 2017-06-23 | 2018-03-13 | 上海马力索精密机械有限公司 | A kind of thin-wall complicated part milling clamper |
| CN208513803U (en) * | 2018-05-21 | 2019-02-19 | 中航动力株洲航空零部件制造有限公司 | Fixture |
| CN213985061U (en) * | 2020-11-23 | 2021-08-17 | 杜明君 | Level gauge is used in civil engineering |
| CN113369936A (en) * | 2021-06-29 | 2021-09-10 | 中国航发贵州黎阳航空动力有限公司 | Device for machining circumferential inclined holes of nozzle nuts of aircraft engines |
| CN214851462U (en) * | 2021-05-26 | 2021-11-23 | 陈惠斐 | Waterproof monitoring device for traffic road |
| CN113976926A (en) * | 2021-12-17 | 2022-01-28 | 中国船舶重工集团公司第十二研究所 | Machining device and method for double-thrust sliding bearing in finish machining stage |
| CN216759028U (en) * | 2021-12-31 | 2022-06-17 | 浙江省军工集团有限公司 | Fixed frock of ring shape work piece processing and notch processing equipment |
-
2022
- 2022-08-31 CN CN202211062755.5A patent/CN115319503B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE787611A (en) * | 1971-08-16 | 1973-02-16 | Monsanto Co | CONTINUOUS POLYMERIZATION UNIT |
| CN202804702U (en) * | 2012-09-07 | 2013-03-20 | 内江神舟机电设备有限公司 | Locating fixture for processing driven bevel gear |
| CN207087367U (en) * | 2017-06-23 | 2018-03-13 | 上海马力索精密机械有限公司 | A kind of thin-wall complicated part milling clamper |
| CN208513803U (en) * | 2018-05-21 | 2019-02-19 | 中航动力株洲航空零部件制造有限公司 | Fixture |
| CN213985061U (en) * | 2020-11-23 | 2021-08-17 | 杜明君 | Level gauge is used in civil engineering |
| CN214851462U (en) * | 2021-05-26 | 2021-11-23 | 陈惠斐 | Waterproof monitoring device for traffic road |
| CN113369936A (en) * | 2021-06-29 | 2021-09-10 | 中国航发贵州黎阳航空动力有限公司 | Device for machining circumferential inclined holes of nozzle nuts of aircraft engines |
| CN113976926A (en) * | 2021-12-17 | 2022-01-28 | 中国船舶重工集团公司第十二研究所 | Machining device and method for double-thrust sliding bearing in finish machining stage |
| CN216759028U (en) * | 2021-12-31 | 2022-06-17 | 浙江省军工集团有限公司 | Fixed frock of ring shape work piece processing and notch processing equipment |
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| Publication number | Publication date |
|---|---|
| CN115319503A (en) | 2022-11-11 |
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