CN212475989U - Vertical lifting device and bogie track pitch changing test bed - Google Patents

Vertical lifting device and bogie track pitch changing test bed Download PDF

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Publication number
CN212475989U
CN212475989U CN202020745337.6U CN202020745337U CN212475989U CN 212475989 U CN212475989 U CN 212475989U CN 202020745337 U CN202020745337 U CN 202020745337U CN 212475989 U CN212475989 U CN 212475989U
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pair
vertical
supporting
rotating
support beam
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CN202020745337.6U
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王旭
王朝涛
刘为亚
徐忠宣
曹晓宁
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CRRC Qingdao Sifang Co Ltd
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CRRC Qingdao Sifang Co Ltd
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Abstract

The utility model relates to a become gauge length test field provides vertical lift device and bogie become gauge length test bench. The vertical lifting device comprises a guide supporting device and a vertical lifting mechanism, wherein the guide supporting device comprises a pair of supporting beams which are oppositely arranged at intervals and a connecting beam connected between the pair of supporting beams; the vertical lifting mechanism comprises vertical actuators which are respectively connected to two ends of the bottom of the supporting beam, and a mounting plate is mounted at the bottom of each vertical actuator. The utility model discloses can effectively simulate the variable gauge bogie at orbital motion's elevating condition.

Description

Vertical lifting device and bogie track pitch changing test bed
Technical Field
The utility model relates to a rail vehicle becomes gauge test technical field, especially relates to vertical lift device and bogie become gauge test platform.
Background
In order to meet the transportation requirements between different gauge tracks of adjacent countries, trucks with different wheel pair inner side gauges are replaced at junctions, and the scheme is high in cost and long in time consumption. Spain and Japan successively utility model have realized that the gauge change bogie, the wheel pair can be in different gauge track intervallic continuous operation.
In order to enable the produced track-changing bogie to smoothly complete track changing on an actual railway vehicle under the action of a ground matching device, a track-changing wheel pair needs to be verified to complete track changing action before the actual vehicle is assembled. Therefore, a testing device which has a simple and reliable structure and can perform simulation tests on various performances of the track-variable bogie is needed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a vertical lifting device can effectively simulate the lifting state of variable gauge bogie at rail running.
The utility model discloses still provide a bogie becomes gauge length test bench.
According to the utility model discloses a vertical lift device of an aspect embodiment, include:
the guide supporting device comprises a pair of supporting beams which are oppositely arranged at intervals and a connecting beam connected between the pair of supporting beams;
vertical lift mechanism is including connecting respectively every the vertical actuator at a supporting beam bottom both ends, every the mounting panel is installed to vertical actuator's bottom.
According to the utility model discloses an embodiment, every vertical actuator's jacking end all with it is articulated to prop up supporting beam's bottom, is located a pair of it is a pair of with one side to prop up supporting beam length direction the bottom of vertical actuator with the mounting panel is articulated, is located a pair of it is a pair of with one side to prop up supporting beam length direction another one side vertical actuator's bottom with mounting panel fixed connection, the rotation direction of every articulated department all with the rotation direction syntropy of wheel.
According to an embodiment of the invention, each the hinge joint all is equipped with tapered roller bearing.
According to the utility model discloses an embodiment, every articulated department realizes articulatedly through the connecting hinge, the connecting hinge is including fixing the rotation connecting seat that a pair of interval of a supporting beam bottom set up, it is equipped with the rotation connecting hole that the level set up to rotate the connecting seat, vertical actuator's tip is equipped with the lug, be equipped with the rotation connecting hole on the lug, rotate the distance between the connecting seat with the thickness of lug matches, the lug is located a pair ofly between the rotation connecting seat to pass through the axis of rotation rotate on the connecting seat rotation connecting hole and rotation connecting hole on the lug will a supporting beam with vertical actuator connects, the direction of rotation of axis of rotation and the direction of rotation syntropy of wheel.
According to an embodiment of the present invention, the tapered roller bearing is installed at a junction of the rotation shaft and the lug.
According to the utility model discloses an embodiment, every a supporting beam all includes the bottom plate and follows the length direction of bottom plate extends and the interval is located relatively a pair of curb plate on the bottom plate, it is a pair of the curb plate with form the removal space of unblock pole between the bottom plate.
According to the utility model discloses an embodiment, an interval is equipped with a pair of deflector in the supporting beam, and is a pair of the deflector is fixed in respectively a pair of a supporting beam inboard of curb plate, it is a pair of form between the deflector the direction space that the unblock pole removed.
According to the utility model discloses an embodiment, direction strutting arrangement still includes roof and gland, the roof is located a supporting beam is used for the top surface with the axle box contact, the gland is including fixing a middle part gland at a supporting beam middle part and fixing a tip gland at a supporting beam both ends.
According to one embodiment of the present invention, the top plates are arranged in pairs, each pair of top plates being arranged on opposite top surfaces of a pair of the side plates; and a pair of top plates is arranged on the part of each supporting beam between the middle gland and the end gland.
According to the utility model discloses a bogie becomes gauge test bench of another aspect embodiment, including basic platform and the aforesaid vertical lift device, every vertical actuator's bottom is passed through the mounting panel and is installed on the basic platform.
The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least:
the utility model discloses vertical lift device, including direction strutting arrangement and vertical lift mechanism, direction strutting arrangement includes that a pair of supporting beam and connection that the interval set up relatively are a pair of tie-beam between the supporting beam, a pair of supporting beam and tie-beam are connected and are formed the braced frame who is used for supporting the variable gauge bogie, and vertical lift mechanism is including connecting respectively every the vertical actuator at a supporting beam bottom both ends, every vertical actuator's bottom is passed through the mounting panel and is installed on basic platform. The guide supporting device can be driven to lift together through the lifting of the vertical actuator, so that the lifting of the variable-gauge bogie is realized, and the lifting state on the track is simulated.
The utility model discloses a bogie becomes gauge test bench, through setting up above-mentioned vertical lift device, can be convenient for simulate the lift on the track when becoming gauge bogie and becoming the gauge.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
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 these drawings without creative efforts.
Fig. 1 is a schematic top view of a guiding and supporting device in a vertical lifting device according to an embodiment of the present invention;
FIG. 2 is a schematic side view of the structure of FIG. 1;
FIG. 3 is a schematic front view of the structure of FIG. 1;
fig. 4 is a schematic front view of the vertical lifting device according to the embodiment of the present invention;
FIG. 5 is a schematic top view of the structure of FIG. 4;
fig. 6 is a side view schematic of the structure of fig. 4.
Reference numerals:
100. a support beam; 110. a base plate; 120. a side plate; 130. a flange seat; 140. a connecting beam; 150. a flange end cover; 160. a top plate; 170. a guide plate; 180. a middle gland bush; 190. an end gland;
200. a vertical actuator; 210. connecting a hinge; 220. a fixed flange; 230. and (7) mounting the plate.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
It should be noted that fig. 1 to fig. 6 are schematic structural diagrams of a vertical lifting device according to an embodiment of the present invention.
On the one hand, as shown in fig. 1 to 6, an embodiment of the present invention provides a vertical lifting device. The vertical lifting device comprises a guide supporting device and a vertical lifting mechanism.
Specifically, the guide support device comprises a pair of support beams 100 arranged oppositely at intervals and a connecting beam 140 connected between the pair of support beams 100, and the pair of support beams 100 and the connecting beam 140 are connected to form a support frame for supporting a variable-gauge bogie (simply referred to as a bogie).
Vertical lift mechanism is including connecting the vertical actuator 200 at every supporting beam 100 bottom both ends respectively, and vertical actuator 200 provides vertical direction for the direction strutting arrangement to play the longitudinal positioning effect, mounting panel 230 is installed to the bottom of every vertical actuator 200, and vertical actuator 200 passes through mounting panel 230 to be installed on basic platform. The guide supporting device can be driven to lift together by lifting the vertical actuator 200. Therefore, the lifting of the variable-gauge bogie is realized, and the lifting state on the track is simulated.
When executing the orbital transfer action, need the direction strutting arrangement to rise, drive the ascending lifting of bogie to make the bogie wheel break away from with the ground track, vertical actuator provides vertical power for direction strutting arrangement.
It should be noted that, the basic platform of this embodiment adopts a T-shaped groove flat plate, that is, a plurality of T-shaped grooves are arranged at intervals on the upper surface of the flat plate to form the T-shaped groove flat plate, which is used as a mounting base for other modules, and may be formed by HT200-300 precision casting.
As shown in fig. 4 to 6, specifically, the jacking end of each vertical actuator 200 is hinged to the bottom of the support beam 100, the bottoms of the pair of vertical actuators 200 located on the same side of the pair of support beams 100 in the length direction are hinged to the mounting plate 230, and the bottoms of the pair of vertical actuators 200 located on the same side of the pair of support beams 100 in the length direction are fixedly connected to the mounting plate 230, that is, if the bogie is divided into front and rear after being installed, the pair of vertical actuators 200 are located at the front end of the bogie, and the pair of vertical actuators 200 are located at the rear end of the bogie. The rotating direction of each hinged part is the same as that of the wheel, and each hinged part is provided with a tapered roller bearing to ensure unidirectional rotation, and the hinged part is hinged through a connecting hinge 210. That is, one pair of the four vertical actuators 200 is an upper and a lower connecting hinges 210, and the other pair of the four vertical actuators 200 is fixedly mounted by the upper connecting hinges 210 and the lower fixing flange 220.
In order to simulate the pitching posture of the bogie in the unloading and loading states, the vertical actuators 200 positioned at the front end and the rear end of the bogie are different from the connecting hinges 210 in connecting form, the piston rods of the vertical actuators 200 are lifted by 28-98 mm in the Z direction (vertical direction), and the guide supporting device can realize the swinging of the maximum inclination angle of 2.3.
In order to truly simulate the track transfer process, when the front end wheel pair of the bogie is unloaded, the front end vertical actuator 200 firstly carries out lifting action; when the rear end wheel pair is unloaded, the rear end vertical actuator carries out lifting action again. Namely, the front and rear vertical actuators have time difference in lifting action, and the guide supporting device is not horizontal.
The two vertical actuators 200 connected by the fixing flange 220 only provide vertical freedom for the guiding and supporting device, limit the transverse movement of the guiding and supporting device and can ensure the stability of the whole testing device.
The vertical actuator 200 connected with the upper and lower double connecting hinges 210 can provide vertical and lateral freedom, thereby realizing the swinging motion of the guiding and supporting device.
Further, the structure of the connecting hinge 210 includes a pair of rotating connecting seats arranged at intervals at the bottom of the supporting beam 100, the rotating connecting seats are provided with rotating connecting holes horizontally arranged, the end of the vertical actuator 200 is provided with a lug, the rotating connecting holes are arranged on the lug, the distance between the rotating connecting seats is matched with the thickness of the lug, the lug is arranged between the pair of rotating connecting seats, and the rotating connecting holes on the rotating connecting seats and the rotating connecting holes on the lug are penetrated through by the rotating shaft, so that the supporting beam 100 is connected with the vertical actuator 200. The direction of rotation of the rotating shaft is in the same direction as the direction of rotation of the wheels 71.
Specifically, the tapered roller bearing is installed at the joint of the rotating shaft and the lug, for example, the inner ring of the tapered roller bearing is tightly sleeved on the rotating shaft, and the outer ring of the tapered roller bearing is tightly fixed in the rotating connecting hole of the lug.
Further, the connection beams 140 are preferably a pair, and the pair of connection beams 140 are connected between the pair of support beams 100 at intervals, and form a support frame structure together with the pair of support beams 100, so that stability is good. Further, a pair of connecting beams 140 are provided in parallel between the pair of support beams 100.
As shown in fig. 1 to 3, each support beam 100 includes a bottom plate 110 and a pair of side plates 120 extending along a length direction of the bottom plate 110 and disposed on the bottom plate 110 at intervals in an opposite manner, and a movement space of the lock release lever is formed between the pair of side plates 120 and the bottom plate 110; the support beam 100 is formed in a U-shaped groove structure with an open top end, so that the unlocking rod can be inserted into the U-shaped groove and can freely move along the length direction of the U-shaped groove.
In order to secure the structural strength, the bottom plate 110 is integrally formed with the side plate 120, or is welded as one body.
According to an embodiment of the present invention, the guiding support device further includes a top plate 160 and a pressing cover, the top plate 160 is disposed on the top surface of the supporting beam 100 for contacting with the axle box, that is, after the variable-gauge bogie is supported on the supporting beam 100, the axle box of the variable-gauge bogie is supported at the top plate 160, on one hand, the supporting area of the axle box is increased by disposing the top plate 160, on the other hand, the supporting strength of the supporting beam 100 can be improved, and sufficient supporting strength is provided for the axle box, so that the strength requirements on the supporting beam 100, such as the bottom plate 110 and the side plate.
The utility model discloses an embodiment, support when being convenient for the track gauge bogie in the test process to go up and down through the braced frame that a supporting beam 100 and tie-beam 140 are constituteed, through a supporting beam 100's specific structural design for a supporting beam 100 has the removal space of unblock pole, thereby the removal and the direction of unblock pole when being convenient for the unblock.
The gland comprises a middle gland 180 fixed at the middle part of the support beam 100 and end glands 190 fixed at the two ends of the support beam 100; through setting up middle part gland 180 and tip gland 190, on the one hand, can improve a supporting beam 100's bulk strength, rigidity, on the other hand, middle part gland 180 can provide supplementary guide effect for wearing to establish the unblock pole in the guide space. In addition, through setting up tip gland 190, can guarantee that the braced frame when elevating gear drive goes up and down, the unblock pole can more effectual and elevating gear synchronous motion, prevents to warp about taking place when going up and down.
In order to provide accurate guide for the unlocking rod during movement, a pair of guide plates 170 are arranged in the support beam 100 at intervals, the pair of guide plates 170 are respectively fixed on the inner sides of the pair of side plates 120 of the support beam 100, specifically, the guide plates 170 can be connected with the inner sides of the side plates 120 through screws, and a guide space for movement of the unlocking rod is formed between the pair of guide plates 170, so that the unlocking rod can smoothly move along the length direction of the guide space under the guide of the guide space.
To facilitate the unlocking bar being able to act on the unlocking device under the axlebox, according to one embodiment of the present invention, the top plates 160 are arranged in pairs, each pair of top plates 160 being arranged on opposite top surfaces of a pair of side plates 120; that is, one top plate 160 is disposed at the top of each side plate 120, and the two top plates 160 are disposed opposite to each other with a gap therebetween, so that the unlocking rod can extend from the gap, thereby applying an acting force to the unlocking device on the axle box to unlock the unlocking device.
The portion of each support beam 100 between the middle gland 180 and the end gland 190 is provided with a pair of top plates 160. Since the track-variable bogie has two wheel pairs, and two ends of each wheel pair are provided with axle boxes, each supporting beam 100 needs to support two axle boxes, and therefore a pair of top plates 160 need to be arranged at the axle boxes of each supporting beam 100, and specifically, each pair of top plates 160 is arranged between the middle gland 180 and the end gland 190 for facilitating the arrangement of the top plates 160.
According to the utility model discloses an embodiment, flange end cover 150 has been constructed respectively at the both ends of every tie-beam 140, a supporting beam 100's corresponding position has been constructed flange seat 130, tie-beam 140 can dismantle with a supporting beam 100 through flange end cover 150 and flange seat 130 and be connected, specifically, pass flange end cover 150 and flange seat 130 through fastening connection spare, link together both, thereby be connected a supporting beam 100 and tie-beam 140 as an organic whole, it is all more convenient with the dismantlement to install, because tie-beam 140 can dismantle, consequently, can change the tie-beam 140 of different length according to bogie axle box specification, adjust supporting beam 100's interval with this.
According to the utility model discloses an embodiment, a supporting beam 100 forms through the steel sheet welding, has sufficient rigidity and intensity, and its bottom links to each other with the last hinge of vertical actuator 200, and tie-beam 140 forms through the channel-section steel welding, and whole welding post-processing forms, has sufficient rigidity and intensity, and it is integrative to link to each other with a supporting beam 100 for improve whole direction strutting arrangement's stability. The connecting beam 140 or the mounting transition piece was replaced during the test to adjust the center distance of the support beam 100 according to the specification and the interface size of different bogies.
Of course, the support beam 100 of this embodiment is not limited to be made of steel plate, but may be made of other suitable materials, and similarly, the connecting beam 140 is not limited to be made of channel plate.
According to an embodiment of the present invention, the guiding plate 170 may be formed by processing flat steel, and the guiding plate 170 is integrated with the side plate 120 by a fastening member such as a screw, and is used for guiding the unlocking lever to a certain extent when the unlocking lever acts in the supporting beam 100.
Of course, the guide plate 170 of the present embodiment is not limited to be made of flat steel, and may be made of other suitable materials.
According to the utility model discloses an embodiment, roof 160 forms through manganese steel sheet processing, and intensity is high, and the wearability is good, and the top surface of roof 160 passes through connecting piece such as screw and curb plate 120 fixed connection, can increase the area of contact with the axle box lower surface through roof 160, can improve direction strutting arrangement's steadiness.
On the other hand, the embodiment of the utility model provides a still provide a bogie gauge change test bench, including basic platform and foretell vertical lift device, every vertical actuator 200's bottom is passed through the mounting panel and is installed on basic platform, can be convenient for simulate the lift on the track when becoming gauge bogie gauge change.
The test bed is also provided with four emergency stop buttons, and when a dangerous event occurs or emergency stop is needed, equipment can be stopped emergently by pressing the emergency stop buttons, and the alarm lamp buzzes and flickers. Two emergency stop buttons are arranged in the control room and the oil pump room, and the two emergency stop buttons are arranged on a test site.
The above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.

Claims (10)

1. A vertical lift device, comprising:
the guide supporting device comprises a pair of supporting beams which are oppositely arranged at intervals and a connecting beam connected between the pair of supporting beams;
vertical lift mechanism is including connecting respectively every the vertical actuator at a supporting beam bottom both ends, every the mounting panel is installed to vertical actuator's bottom.
2. The vertical lifting device according to claim 1, wherein the top of each vertical actuator is hinged to the bottom of the support beam, the bottom of each vertical actuator on the same side of the length direction of the support beam is hinged to the mounting plate, the bottom of each vertical actuator on the same side of the length direction of the support beam is fixedly connected to the mounting plate, and the rotation direction of each hinge is in the same direction as the rotation direction of the wheels.
3. The vertical lift device of claim 2 wherein each of said hinges is provided with a tapered roller bearing.
4. The vertical lifting device as claimed in claim 3, wherein each of the hinges is hinged by a connecting hinge, the connecting hinge comprises a pair of rotating connecting seats fixed at the bottom of the supporting beam and arranged at intervals, the rotating connecting seats are provided with rotating connecting holes arranged horizontally, the end of the vertical actuator is provided with a lug, the lug is provided with a rotating connecting hole, the distance between the rotating connecting seats is matched with the thickness of the lug, the lug is arranged between the pair of rotating connecting seats, the supporting beam is connected with the vertical actuator by a rotating shaft passing through the rotating connecting hole on the rotating connecting seat and the rotating connecting hole on the lug, and the rotating direction of the rotating shaft is the same as the rotating direction of the wheel.
5. The vertical lift device of claim 4, wherein said tapered roller bearings are mounted at the junction of said rotating shaft and said lugs.
6. The vertical lifting device according to claim 1, wherein each of the support beams includes a bottom plate and a pair of side plates extending in a length direction of the bottom plate and disposed on the bottom plate at an interval in an opposed manner, and a movement space of the lock release lever is formed between the pair of side plates and the bottom plate.
7. The vertical lifting device according to claim 6, wherein a pair of guide plates are provided at intervals in the support beam, the pair of guide plates are fixed to inner sides of a pair of side plates of the support beam, respectively, and a guide space for movement of the lock release lever is formed between the pair of guide plates.
8. The vertical lift device according to claim 6, wherein said guide support means further comprises a top plate provided on a top surface of said support beam for contacting the axle housing, and a pressing cover including a middle pressing cover fixed to a middle portion of said support beam and end pressing covers fixed to both ends of said support beam.
9. The vertical lift device of claim 8 wherein said top plates are arranged in pairs, each pair of said top plates being disposed on opposite top surfaces of a pair of said side plates; and a pair of top plates is arranged on the part of each supporting beam between the middle gland and the end gland.
10. A bogie track-changing test bed, which comprises a base platform and is characterized by further comprising a vertical lifting device as claimed in any one of claims 1 to 9, wherein the bottom of each vertical actuator is mounted on the base platform through a mounting plate.
CN202020745337.6U 2020-05-08 2020-05-08 Vertical lifting device and bogie track pitch changing test bed Active CN212475989U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020745337.6U CN212475989U (en) 2020-05-08 2020-05-08 Vertical lifting device and bogie track pitch changing test bed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020745337.6U CN212475989U (en) 2020-05-08 2020-05-08 Vertical lifting device and bogie track pitch changing test bed

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Publication Number Publication Date
CN212475989U true CN212475989U (en) 2021-02-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114274543A (en) * 2021-12-15 2022-04-05 成都飞机工业(集团)有限责任公司 Reinforced skin positioning and forming method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114274543A (en) * 2021-12-15 2022-04-05 成都飞机工业(集团)有限责任公司 Reinforced skin positioning and forming method
CN114274543B (en) * 2021-12-15 2023-01-10 成都飞机工业(集团)有限责任公司 Reinforced skin positioning and forming method

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