CN113560634A - Device for machining reverse thrust component combined hole of aviation transmitter - Google Patents
Device for machining reverse thrust component combined hole of aviation transmitter Download PDFInfo
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- CN113560634A CN113560634A CN202110822377.5A CN202110822377A CN113560634A CN 113560634 A CN113560634 A CN 113560634A CN 202110822377 A CN202110822377 A CN 202110822377A CN 113560634 A CN113560634 A CN 113560634A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
- B23B47/28—Drill jigs for workpieces
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
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Abstract
The invention discloses a device for machining a combined hole of a thrust reverser of an aircraft engine, and relates to the technical field of combined hole machining. A device for processing a combined hole of a reverse-thrust component of an aviation transmitter comprises an installation plate, and a first clamping component and a second clamping component which are annular as a whole, wherein the first clamping component and the second clamping component are respectively connected with the installation plate, and the first clamping component is positioned on the inner side of the second clamping component; the first clamping assembly is used for clamping a part with a smaller rotating diameter, and the second clamping assembly is used for clamping a part with a larger rotating diameter. The first clamping component and the second clamping component of the combined hole machining device enable the connecting positions of the mounting edge and the support arm of the corresponding reverse thrust component to be kept fixed, and displacement is avoided, so that holes can be machined on the mounting edge and the support arm at the same time, machining precision of the combined hole is improved, and the first clamping component and the second clamping component can be used for machining the two reverse thrust components at the same time, and machining efficiency of the combined hole is improved.
Description
Technical Field
The invention relates to the technical field of combined hole machining, in particular to a device for machining a combined hole of a reverse thrust component of an aviation transmitter
Background
The thrust reverser is an important component in an aircraft engine, the thrust reverser structurally comprises a thrust reverser with a smaller rotary diameter and a thrust reverser with a larger rotary diameter, the two thrust reversers comprise annular mounting edges and supporting arms, and the supporting arms are respectively assembled at two ends of the mounting edges and are provided with holes at the connecting positions of the mounting edges and the supporting arms, so that the requirements on the hole diameters and the position precision of the mutually matched holes are high, but the precision of the current device for machining the thrust reversers is low and the machining efficiency is low.
Disclosure of Invention
The invention aims to provide a device for machining a combined hole of a reverse thrust component of an aeronautical transmitter, which aims to solve the problem of low precision of machining the combined hole of the component by the conventional device.
The technical scheme for solving the technical problems is as follows:
a device for processing a reverse-thrust component combined hole of an aviation transmitter comprises an installation plate, and a first clamping component and a second clamping component which are integrally arc-shaped, wherein the first clamping component and the second clamping component are respectively connected with the installation plate, and the first clamping component is positioned on the inner side of the second clamping component; the first clamping assembly is used for clamping a reverse thrust component with a smaller rotation diameter and comprises a first limiting piece, a plurality of clamping assemblies and a second limiting piece which are sequentially connected; the second clamping assembly is used for clamping a reverse thrust component with a larger rotation diameter and comprises a third limiting part, a plurality of clamping assemblies and a fourth limiting part which are sequentially connected.
The beneficial effect who adopts above-mentioned scheme does: after the support arms of the two thrust reversing components are respectively embedded into the mounting edges of the two thrust reversing components, the support arms of the thrust reversing components with smaller rotating diameters are respectively fixed through a first limiting part and a second limiting part, the support arms of the thrust reversing components with larger rotating diameters are fixed through a third limiting part and a fourth limiting part, the mounting edges of the two thrust reversing components are clamped through a plurality of clamping components, the first clamping component enables the mounting edges of the thrust reversing components with smaller rotating diameters and the connecting positions of the support arms to be kept fixed, the second clamping component enables the mounting edges of the thrust reversing components with larger rotating diameters and the connecting positions of the support arms to be kept fixed, and displacement is avoided, therefore, holes are simultaneously machined in the mounting edge and the support arm, the machining precision of the combined hole is improved, the first clamping component and the second clamping component are arranged to simultaneously machine two reverse thrust parts, and the efficiency of machining the combined hole is improved.
Furthermore, the clamping assembly comprises a fastening plate and a positioning plate, the fastening plate and the positioning plate are oppositely arranged and are detachably connected with the mounting plate respectively, a clamping cavity is formed between the fastening plate and the positioning plate, and the clamping cavity is distributed along an arc path where the corresponding clamping assembly is located.
Furthermore, one side of the fastening plate facing the positioning plate is step-shaped, and one side of the positioning plate facing the fastening plate is an inclined plane.
The beneficial effect who adopts above-mentioned scheme does: the fastening plate is step-shaped, so that the mounting edges of the corresponding thrust reversing components can be conveniently placed, the positioning plate plays a role in positioning, and the fastening plate and the positioning plate are matched to enable the mounting edges of the two thrust reversing components to be respectively and tightly mounted on the mounting plate.
Furthermore, the fastening plate is connected with the mounting plate through a screw, the positioning plate is connected with the mounting plate through a pin and a screw, the top end of the fastening plate is provided with a pressing plate, one end of the pressing plate is connected with the fastening plate, and the other end of the pressing plate is contacted with the top of the corresponding reverse thrust component; the fastening plate is also provided with a fastening piece, the fastening piece is close to the pressing plate, and one end of the fastening piece is contacted with the mounting edge of the corresponding reverse thrust component after penetrating through the fastening plate.
The beneficial effect who adopts above-mentioned scheme does: the clamp plate plays the effect of the installation edge of the fastening connection reverse thrust component and the fastening plate, so that the installation edge of the corresponding reverse thrust component is stressed, the reverse thrust component is well embedded in the clamping cavity, the fastening piece plays a role in positioning, and the installation edge of the corresponding reverse thrust component is not easy to displace after being embedded in the clamping cavity.
Furthermore, first locating part and second locating part all include first backup pad and first fixed plate, and first backup pad is connected first fixed plate perpendicularly to be equipped with on the first backup pad with the first mounting hole of the support arm matched with of the less back-pushing component of diameter of gyration, first fixed plate passes through the pin and the screw is connected with the mounting panel.
The beneficial effect who adopts above-mentioned scheme does: one end of the support arm is connected with the mounting edge, the other end of the support arm is matched with the first mounting hole, and the first mounting hole plays a limiting role.
Furthermore, the third limiting part and the fourth limiting part respectively comprise a second supporting plate and a second fixing plate, the second supporting plate is vertically connected with the second fixing plate, a second mounting hole matched with the support arm of the reverse pushing component with the larger rotation diameter is formed in the second supporting plate, and the second fixing plate is connected with the mounting plate through a pin and a screw; the third limiting part and the fourth limiting part respectively comprise a connecting piece, and one end of each connecting piece penetrates through the second mounting hole and is connected with the corresponding reverse thrust component.
The beneficial effect who adopts above-mentioned scheme does: one end of the support arm is connected with the mounting edge, the other end of the support arm is matched with the second mounting hole, and the connecting piece penetrates through the second mounting hole to play a limiting role in the support arm.
Furthermore, the mounting plate is fan-shaped, 5 groups of clamping assemblies are respectively arranged between the first limiting part and the second limiting part and between the third limiting part and the fourth limiting part, and the 5 groups of clamping assemblies are matched with the corresponding reverse thrust components.
The beneficial effect who adopts above-mentioned scheme does: the installation edge of the reverse pushing component with the smaller rotation diameter and the installation edge of the reverse pushing component with the larger rotation diameter are fixed by 5 groups of clamping assemblies, the installation edges are subjected to uniform clamping force, and the machining precision of the combined hole of the reverse pushing component is improved.
Furthermore, the mounting plate is also provided with positioning pieces, and the number of the positioning pieces is 2 and the positioning pieces are respectively connected with the positioning process holes of the reverse pushing component with smaller rotation diameter and the positioning process holes of the reverse pushing component with larger rotation diameter.
The beneficial effect who adopts above-mentioned scheme does: the locating piece can restrict two reverse-thrust components and produce angular deviation, and quick location center prevents that two reverse-thrust components from controlling the displacement, and then ensures the machining precision of combination hole.
Furthermore, a hanging ring is arranged on the mounting plate.
The invention has the following beneficial effects:
1. the first clamping assembly enables the mounting edge of the reverse pushing component with the smaller rotating diameter and the connecting position of the support arm to be kept fixed, the second clamping assembly enables the mounting edge of the reverse pushing component with the larger rotating diameter and the connecting position of the support arm to be kept fixed, and displacement is avoided, so that holes can be simultaneously machined on the mounting edge and the support arm, machining precision of a combined hole is improved, and the first clamping assembly and the second clamping assembly can simultaneously machine two reverse pushing components, and machining efficiency of the combined hole is improved.
2. The fastening plate is step-shaped, so that the mounting edges of the corresponding thrust reversing components can be conveniently placed, the positioning plate plays a role in positioning, and the fastening plate and the positioning plate are matched to enable the mounting edges of the two thrust reversing components to be respectively and tightly mounted on the mounting plate.
3. The pressing plate plays a role in tightly connecting the mounting edge of the corresponding reverse pushing component with the fastening plate, so that the mounting edge of the corresponding reverse pushing component is stressed and is well embedded in the clamping cavity, and the fastening piece plays a role in positioning, so that the mounting edge of the corresponding reverse pushing component is not easy to displace after being embedded in the clamping cavity.
4. The mounting edge of the reverse pushing component with smaller rotation diameter and the mounting edge of the reverse pushing component with larger rotation diameter are fixed by 5 groups of clamping assemblies, and the mounting edges are subjected to uniform clamping force, so that the processing precision of the combined hole of the reverse pushing component is improved.
5. The positioning piece can limit the two reverse-thrust components to generate angular offset, quickly position the center, prevent the two reverse-thrust components from moving left and right, and further ensure the processing precision of the combined hole.
Drawings
Fig. 1 is a schematic structural view of a first thrust reverser member and a second thrust reverser member.
Fig. 2 is a schematic structural diagram of the device for machining the combined hole of the thrust reverser of the aeroengine.
Fig. 3 is a schematic structural diagram of the device for machining the combined hole of the thrust reverser of the aeronautical engine, provided with the first thrust reverser and the second thrust reverser.
Fig. 4 is a schematic structural diagram at a in fig. 3.
Fig. 5 is a schematic structural diagram at B in fig. 3.
Fig. 6 is a schematic structural diagram at C in fig. 3.
In the figure: 1-a first limit piece; 2-a second limit; 3-a third limiting member; 4-a fourth stop; 5, mounting a plate; 6-a clamping assembly; 601-a fastening plate; 602-a positioning plate; 7-a clamping cavity; 8-pressing a plate; 801-fasteners; 901-a first support plate; 902-a first fixation plate; 903 — a second support plate; 904-second fixation plate; 10-a connector; 11-a positioning element; 12-a hoisting ring; 111-a first mounting edge; 112-a first support arm; 113-a second mounting edge; 114-a second arm; 115-mounting ring.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Examples
Referring to fig. 1, the thrust reversing component includes a first thrust reversing component with a smaller rotation diameter and a second thrust reversing component with a larger rotation diameter, the first thrust reversing component includes a first mounting edge 111 and a first support arm 112, the second thrust reversing component includes a second mounting edge 113 and a second support arm 114, the first mounting edge 111 and the second mounting edge 113 are respectively annular, two ends of the first mounting edge 111 and the second mounting edge 113 are respectively connected with a first support arm 112 and a second support arm 114, one ends of the first support arm 112 and the second support arm 114 are respectively embedded at two ends of the first mounting edge 111 and the second mounting edge 113, the other end of the first support arm 112 is processed with a thread, the other end of the second support arm 114 is provided with a mounting ring 115, and the number of the mounting rings 115 is 2 and is fixedly connected to the second support arm 114.
Referring to fig. 2 and 3, the device for processing the combined hole of the reverse-thrust component comprises an installation plate 5, and a first clamping component and a second clamping component which are integrally arc-shaped, wherein the first clamping component and the second clamping component are respectively connected with the installation plate 5, the first clamping component is positioned on the inner side of the second clamping component, the first clamping component is used for clamping the first reverse-thrust component, and the second clamping component is used for clamping the second reverse-thrust component. When the both ends of first installation limit 111 are connected with first support arm 112 respectively, the both ends of second installation limit 113 are connected with second support arm 114 respectively after, first counterthrust part carries out the centre gripping by first clamping subassembly, the centre gripping is carried out by second clamping subassembly to second counterthrust part, first counterthrust part can be avoided to first clamping subassembly and second clamping subassembly, second counterthrust part produces the displacement, thereby to first installation limit 111 and first support arm 112, second installation limit 113 and second support arm 114 simultaneous processing hole, the machining precision of combination hole has been improved, and set up first clamping subassembly and second clamping subassembly and can process two counterthrust parts simultaneously, the efficiency of processing combination hole is improved.
Referring to fig. 1, 2, 4 and 6, the first clamping assembly includes a first limiting member 1, a clamping assembly 6 and a second limiting member 2 connected in sequence, and the second clamping assembly includes a third limiting member 3, a clamping assembly 6 and a fourth limiting member 4 connected in sequence. The first limiting part 1 and the third limiting part 3 are arranged at one end of the mounting plate 5, the second limiting part 2 and the fourth limiting part 4 are arranged at the other end of the mounting plate 5, and the first limiting part 1 and the second limiting part 2, the third limiting part 3 and the fourth limiting part 4 correspond to each other one by one. The first limiting part 1 and the second limiting part 2 respectively limit the support arm of the reverse pushing part with a smaller rotating diameter, the third limiting part 3 and the fourth limiting part 4 respectively limit the support arm of the reverse pushing part with a larger rotating diameter, the deviation of the centers of the first reverse pushing part and the second reverse pushing part is avoided, and the first reverse pushing part and the second reverse pushing part are stressed uniformly. The first limiting part 1 and the second limiting part 2 respectively include a first supporting plate 901 and a first fixing plate 902, the first supporting plate 901 is vertically connected to the first fixing plate 902, a first mounting hole is formed in the first supporting plate 901, the first supporting arm 112 is matched with the first mounting hole, the first supporting arm 112 penetrates through the first mounting hole and then is connected with a nut, and the first fixing plate 902 is connected with the mounting plate 5 through a pin and a screw. Third locating part 3 and fourth locating part 4 include second backup pad 903 and second fixed plate 904 respectively, second backup pad 903 is connected second fixed plate 904 perpendicularly, and be equipped with the second mounting hole on the second backup pad 903, 2 collar 115 contacts with the both sides of backup pad respectively, the diameter of second mounting hole is unanimous with the internal diameter of collar 115, third locating part 3 and fourth locating part 4 still include connecting piece 10 respectively, connecting piece 10 is the bench pin, the one end of connecting piece 10 has passed collar 115 and second mounting hole in proper order and connecting piece 10 has carried out wear-resisting treatment, service life is improved, the other end processing of connecting piece 10 has the annular knurl, ensure that the accuracy of mounted position does benefit to the operation again.
Referring to fig. 1, 2 and 5, the clamping assembly 6 includes a fastening plate 601 and a positioning plate 602, the fastening plate 601 is disposed opposite to the positioning plate 602, a clamping cavity 7 is formed between the fastening plate 601 and the positioning plate 602, the mounting plate 5 is fan-shaped, one side of the fastening plate 601 facing the positioning plate 602 is step-shaped, the positioning plate 602 is inclined with the first mounting edge 111 and the second mounting edge 113, the fastening plate 601 is step-shaped to facilitate the first mounting edge 111 and the second mounting edge 113 to be placed thereon, the positioning plate 602 performs positioning, and the fastening plate 601 and the positioning plate 602 cooperate to enable the first mounting edge 111 and the second mounting edge 113 to be tightly mounted on the mounting plate 5. The mounting plate 601 passes through the screw to be connected with mounting panel 5, the quantity of screw is 4 and the symmetry sets up, the top of mounting plate 601 is equipped with clamp plate 8, clamp plate 8's one end and fastener 801 contact and be connected with mounting plate 601 through the pin, clamp plate 8's the other end respectively with first installation limit 111, the top contact of second installation limit 113, clamp plate 8 makes first installation limit 111, the atress of second installation limit 113, thereby inlay well and establish in centre gripping cavity 7, fastener 801 plays the effect of location, make first installation limit 111, second installation limit 113 inlays and is difficult to produce the displacement behind the centre gripping cavity 7. The fastening plate 601 is further provided with a fastening piece 801, the fastening piece 801 is close to the pressure plate 8, and one end of the fastening piece 801 penetrates through the fastening plate 601 and then contacts with the side walls of the first mounting edge 111 and the second mounting edge 113. The positioning plate 602 is connected with the mounting plate 5 through a pin and a screw, and the positioning plate 602 plays a role in positioning. In this embodiment, 5 sets of clamping assemblies 6 are respectively disposed between the first limiting member 1 and the second limiting member 2, and between the third limiting member 3 and the fourth limiting member 4, and the 5 sets of clamping assemblies 6 are respectively disposed along the mounting edge of the first thrust reverser and the mounting edge of the second thrust reverser.
Still be equipped with setting element 11 on the mounting panel 5, setting element 11 is the pin, and the quantity of setting element 11 is 2, and one of them setting element 11 is connected with the location fabrication hole of first mounting panel 5, and the location fabrication hole on another setting element 11 and second installation limit 113, setting element 11 can restrict two counterthrust parts and produce angular deflection, and quick positioning center prevents that two counterthrust parts from controlling the skew, and then ensures the machining precision in combination hole. Be equipped with rings 12 on the mounting panel 5, rings 12's quantity is 2 in this embodiment, and 2 rings 12 symmetry sets up, and rings 12 include link and installation end, and the link is the ring form, and the installation end is the screw thread and is connected with mounting panel 5.
The installation of the device and the processing process of the combined hole are as follows: 1) one end of a first support arm 112 and one end of a second support arm 114 are respectively embedded in a first mounting edge 111 and a second mounting edge 113, the other end of the first support arm 112 penetrates through a first mounting hole and then is connected with a nut, and after a mounting ring 115 at the other end of the second support arm 114 is matched with a second mounting hole, a positioning piece 11 is respectively connected with the first mounting edge 111 and the second mounting edge 113; 2) the 5 groups of clamping components 6 are sequentially arranged on the mounting plate 5, and combined holes are processed at the joints of the first mounting edge 111, the first support arm 112, the second mounting edge 113 and the second support arm 114.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. An apparatus for machining an aircraft engine thrust reverser assembly bore, comprising: the clamping device comprises a mounting plate (5), and a first clamping component and a second clamping component which are integrally arc-shaped, wherein the first clamping component and the second clamping component are respectively connected with the mounting plate (5), and the first clamping component is positioned on the inner side of the second clamping component; the first clamping assembly is used for clamping a reverse thrust component with a smaller rotary diameter and comprises a first limiting piece (1), a plurality of clamping assemblies (6) and a second limiting piece (2) which are connected in sequence; the second clamping assembly is used for clamping a reverse thrust component with a large rotation diameter and comprises a third limiting part (3), a plurality of clamping assemblies (6) and a fourth limiting part (4) which are sequentially connected.
2. The device for machining combined holes of thrust reverser components of an aircraft according to claim 1, wherein the clamping assembly (6) comprises a fastening plate (601) and a positioning plate (602), the fastening plate (601) is arranged opposite to the positioning plate (602) and is detachably connected with the mounting plate (5) respectively, a clamping cavity (7) is formed between the fastening plate (601) and the positioning plate (602), and the clamping cavities (7) are distributed along an arc-shaped path where the corresponding clamping assembly is located.
3. Device for machining combined holes of thrust reverser components for aircraft according to claim 2, characterized in that the side of the fastening plate (601) facing the positioning plate (602) is stepped, the side of the positioning plate (602) facing the fastening plate (601) being bevelled.
4. The device for processing the combined hole of the thrust reverser for an aeronautical engine according to claim 3, wherein the fastening plate (601) is connected with the mounting plate (5) through screws, the positioning plate (602) is connected with the mounting plate (5) through pins and screws, a pressure plate (8) is arranged at the top end of the fastening plate (601), one end of the pressure plate (8) is connected with the fastening plate (601), and the other end of the pressure plate (8) is in contact with the top of the corresponding thrust reverser; the fastening plate (601) is further provided with a fastening piece (801), the fastening piece (801) is close to the pressing plate (8), and one end of the fastening piece (801) penetrates through the fastening plate (601) and then is in contact with the mounting edge of the corresponding reverse thrust component.
5. The device for processing the combined hole of the thrust reverser component of the aeroengine according to claim 4, wherein the first limiting member (1) and the second limiting member (2) each comprise a first supporting plate (901) and a first fixing plate (902), the first supporting plate (901) is vertically connected to the first fixing plate (902), a first mounting hole matched with the support arm of the thrust reverser component with a smaller turning diameter is formed in the first supporting plate (901), and the first fixing plate (902) is connected with the mounting plate (5) through a pin and a screw.
6. The device for machining the combined hole of the thrust reverser component of an aeronautical transmitter according to claim 5, wherein the third limiting member (3) and the fourth limiting member (4) respectively comprise a second supporting plate (903) and a second fixing plate (904), the second supporting plate (903) is vertically connected with the second fixing plate (904), a second mounting hole matched with the support arm of the thrust reverser component with a larger rotation diameter is formed in the second supporting plate (903), and the second fixing plate (904) is connected with the mounting plate (5) through a pin and a screw; the third limiting part (3) and the fourth limiting part (4) further comprise connecting pieces (10) respectively, and one end of each connecting piece (10) penetrates through the corresponding second mounting hole and is connected with the corresponding reverse thrust component.
7. The device for machining combined holes of thrust reversal components of an aeronautical transmitter according to any one of claims 1 to 6, characterized in that the mounting plate (5) is sector-shaped, 5 sets of the clamping assemblies (6) are respectively provided between the first limiting member (1) and the second limiting member (2) and between the third limiting member (3) and the fourth limiting member (4), and 5 sets of the clamping assemblies (6) are matched with corresponding thrust reversal components.
8. The device for processing the combined hole of the thrust reverser component of an aeronautical sender according to claim 7, wherein the mounting plate (5) is further provided with positioning pieces (11), and the number of the positioning pieces (11) is 2 and the positioning pieces are respectively connected with the positioning process holes of the thrust reverser component with a smaller turning diameter and the positioning process holes of the thrust reverser component with a larger turning diameter.
9. Device for machining combined holes of thrust reverser components for aeronautical dispatchers according to claim 8, characterized in that the mounting plate (5) is provided with a suspension ring (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110822377.5A CN113560634B (en) | 2021-07-21 | 2021-07-21 | Device for machining combined hole of reverse thrust component of aero-engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110822377.5A CN113560634B (en) | 2021-07-21 | 2021-07-21 | Device for machining combined hole of reverse thrust component of aero-engine |
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| Publication Number | Publication Date |
|---|---|
| CN113560634A true CN113560634A (en) | 2021-10-29 |
| CN113560634B CN113560634B (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110822377.5A Active CN113560634B (en) | 2021-07-21 | 2021-07-21 | Device for machining combined hole of reverse thrust component of aero-engine |
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| US20020014142A1 (en) * | 2000-07-28 | 2002-02-07 | Ward Andrew J. | Air actuated finger pull back chuck |
| CN104475595A (en) * | 2014-12-01 | 2015-04-01 | 四川成发航空科技股份有限公司 | Reverse push door assembly riveting device for aircraft engine |
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|---|---|
| CN113560634B (en) | 2022-10-18 |
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