CN110026907A - A kind of whole disconnected muscle region prestress peen forming method of band muscle siding - Google Patents
A kind of whole disconnected muscle region prestress peen forming method of band muscle siding Download PDFInfo
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- CN110026907A CN110026907A CN201910268574.XA CN201910268574A CN110026907A CN 110026907 A CN110026907 A CN 110026907A CN 201910268574 A CN201910268574 A CN 201910268574A CN 110026907 A CN110026907 A CN 110026907A
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- muscle
- disconnected
- siding
- peening
- region
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
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- Mechanical Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of disconnected muscle region prestress peen forming methods of entirety band muscle siding, assist prestress peen forming tooling, and effective connection with machine tool guideway according to the production of the sectional dimension of rib is corresponding before siding processing.When integral panel prestressing force clamping starts, fixture for forming is installed in corresponding disconnected muscle region, it is adjusted according to the height of rib to suitable position, fixture for forming and machine tool guideway are fastenedly connected simultaneously, the auxiliary prestressing force clamping to disconnected muscle region is realized by the feeding bolt adjusted on fixture for forming, ensure that integral panel disconnected muscle region during prestressing force clamping is effectively controlled, shape does not mutate, the final round and smooth state for guaranteeing integral panel prestressing force clamping.
Description
Technical field
This application involves aircraft manufacturing technical fields, are further the contour peening manufactures of aircraft target ship, specifically a kind of
The whole disconnected muscle region prestress peen forming method of band muscle siding.
Background technique
Shot-blasting formation technique is a kind of more mature plastic molding method of current metal wings siding, bigger in order to obtain
Curvature shape, be commonly applied prestressing force during contour peening so that siding occur before shot-peening it is pre- in elastic range
Deformation, is then plastically deformed under the shock of high-speed cruising bullet, the final shape for obtaining theory calls.If not applying pre-
Stress uses merely bullet to carry out shot-peening, then is difficult to obtain biggish curvature shape, therefore, for the rigidity such as whole band muscle class compared with
Strong metal wallboard carries out shot-peening just only under pre-stressed state and can get the shape of theory calls.The whole band muscle of saddle-shape
Siding then belongs to the prominent example in such siding, however in practical research and production at present, the whole band muscle siding of saddle-shape is pre-
Remain certain problem in stress forming: " the rib length of integral panel is not completely equivalent, and the disconnected muscle region of rib is not
It is completely disposed on same vertical plane, the disconnected muscle region of siding and other band muscle area rigids differ greatly, in prestressing force clamping process
Prestressing force installation way cannot be selected according to the position for the muscle muscle head that breaks completely, therefore, siding is bound in prestressing force clamping process
There is the disconnected muscle region in part to be in " no prestressing force clamping area ", leads to the disconnected muscle muscle Head Section area deformation of prestressing force clamping process and with muscle area
Area deformation is inconsistent, and siding integrated prestress clamping is not round and smooth, and disconnected muscle region shape is easy to appear mutation."
When carrying out pre-bending clamping stress column generally is arranged in siding inner surface, in wall in saddle-shape band muscle integral panel
Siding is applied prestressing force from outer surface by plate outer surface setting force column, it is desirable that the whole table inside in the longitudinal direction of siding
Face protuberance, at this point, being in the disconnected muscle muscle head region shape in " no prestressing force clamping area " can mutate, generates biggish stress collection
In, or even occur the phenomenon that rib and covering tearing in prestressing force clamping process, seriously affect the contour peening effect of siding.
In this case, it had both been able to satisfy the optimal prestressing force installation way of siding currently without a kind of effective method, simultaneously
Also it can guarantee the disconnected ideal pre-stressed state of muscle muscle head region.Also, lack the whole disconnected muscle region of band muscle siding both at home and abroad to answer in advance
Power contour peening is directed to Journal of Sex Research, can not preferably solve above-mentioned ask at present by adjusting shot-blast process method and technological parameter
Topic.
Summary of the invention
The purpose of the application is to propose a kind of whole band area muscle siding Duan Jin for practical problem of the existing technology
Domain prestress peen forming method.
A kind of whole disconnected muscle region prestress peen forming method of band muscle siding, designs disconnected muscle region aids pre stress shot peen
Fixture for forming, to length compared with short rib break muscle region carry out prestressing force clamping, in conjunction with the integrated prestress clamping of siding, thus
Reach the whole band good prestressing force clamping state of muscle siding.After completing clamping, disconnected muscle region part outer surface is carried out tangential
Then contour peening is opened up to contour peening disconnected muscle region inner surface rib, finally carry out shot-peening school according to profile state
Shape, until disconnected muscle region shape completes disconnected muscle region contour peening after meeting theory calls.
A kind of whole disconnected muscle region prestress peen forming method of band muscle siding, including an auxiliary prestress peen forming
Tooling, auxiliary prestress peen forming tooling include connecting support, U-shaped piece, feeding bolt, connecting support lower part and machine tool guideway
Cooperation is slided and can be fixed on guide rail along guide rail, and on the support, U-shaped piece of center is equipped with the spiral shell with feeding bolt for U-shaped piece of fixation
Line blind hole breaks muscle Town Card in U-shaped piece of U-shaped opening with muscle siding, and U-shaped opening face is fitted on the web surface of siding, into
Row forming method, the following steps are included:
1 is connected auxiliary prestress forming tooling connecting support with lathe lower guideway, and makes the disconnected muscle region of band muscle siding
It falls into U-shaped piece of U-shaped opening, feeds U-shaped piece of the bolt pusher pre-bending magnitude for compressing web surface to setting, complete band muscle siding
The prestressing force clamping in disconnected muscle region；
Disconnected muscle area surfaces partial region is protected with shot-peening protective glue band after 2 prestressing force clampings
3 pairs of disconnected muscle area surfaces carry out chordwise shot-peening forming
4 pairs of disconnected muscle region inner surfaces are opened up to contour peening
5 open up after shot-peening completion, lay down siding prestressing force clamping, siding are placed on receiver ga(u)ge outside carrying out
Shape inspection does not need to carry out shot-peening school shape, conversely, spraying using ultrasonic wave if disconnected muscle region shape is bonded inspection template completely
Ball machine carries out shot-peening school shape to disconnected muscle region surfaces externally and internally, judges tangential according to fit-state or opens up to shape and be unsatisfactory for wanting
It asks, manual manipulation ultrasonic wave compressed air shotblasting machine is gradually bonded template and carries out tangential or open up to school shape, until finally meeting the requirements.
The beneficial effects of the present application are as follows: problem is shaped for the whole disconnected muscle region shape of band muscle siding at present, proposes solution
Certainly method carries out prestress peen forming to disconnected muscle region, by designing disconnected muscle region aids prestress peen forming tooling,
Prestressing force is applied to disconnected muscle region, eliminates disconnected muscle region shape phenomenon out of control in integral panel prestressing force clamping process, from
And make disconnected muscle region shape under pre-stressed state round and smooth, unstressed centrostigma.From source to the shape in disconnected muscle region into
It has gone control, chordwise shot-peening forming then is carried out to disconnected muscle region, is opened up to forming and shot-peening school shape, it is final to obtain disconnected muscle region and close
Especially shape.The disconnected muscle region aids prestress peen forming tool structure is simple, and prestressing force clamping is easy to operate, from the root pole
Muscle region shape situation easily out of control is resolved in big improvement.In addition, by measuring the area Duan Jin in time in prestressing force clamping process
The tangential shape in domain, can be before the chordwise shot-peening forming of disconnected muscle region to disconnected muscle area surfaces part " the obvious region of biconvex trend "
It is protected, prevents from generating irreversible shape during " biconvex region " the later period shot-peening.Finally, opening up the craft after forming
Ultrasonic wave school shape neatly can carry out shot-peening school shape according to muscle region exact shape of breaking, final to guarantee disconnected muscle region shape light
It is suitable.Preferably resolve the problems such as whole band muscle the siding disconnected control of muscle region shape, contour peening.
The application is described in further detail below in conjunction with attached drawing is implemented.
Detailed description of the invention
The schematic diagram of Fig. 1 integral panel prestressing force clamping state；
Fig. 2 does not take in disconnected muscle region status diagram when prestressing force clamping；
Fig. 3 assists the schematic diagram of prestress peen forming tooling and prestress application；
Fig. 4 assists prestress peen forming tooling scheme of installation；
The schematic diagram of Fig. 5 installation auxiliary prestress peen forming tooling squab panel integrality；
The schematic diagram of disconnected muscle zone state after Fig. 6 installation auxiliary prestress peen forming tooling；
The disconnected preceding protection zone of the tangential shot-peening of muscle area surfaces Fig. 7 and chordwise shot-peening forming schematic diagram；
Fig. 8 is opened up to contour peening schematic diagram in disconnected muscle region.
Explanation: 1, integral panel is numbered in figure；2, prestress clamp；3, strengthening rib strip；4, disconnected muscle region；5, auxiliary is answered in advance
Power contour peening tooling；6, connecting support；7, U-shaped piece；8, bolt is fed；9, machine tool guideway；10, web surface；11, disconnected muscle region
Midpoint；12, siding inner surface；13, rib side；14, elbow jet nozzles
Specific embodiment
A kind of whole disconnected muscle region prestress peen forming method of band muscle siding, including an auxiliary prestress peen forming
Tooling 5, auxiliary prestress peen forming tooling 5 include connecting support 6, U-shaped piece 7, feeding bolt 8,6 lower part of connecting support and machine
Bed guide rail 9 cooperates, and slides and can be fixed on guide rail along guide rail, U-shaped piece 7 is fixed in connecting support 6, and U-shaped piece of 7 centers are equipped with
With the tapped blind hole of feeding bolt 8, it is stuck in U-shaped piece 7 of U-shaped opening with the disconnected muscle region 4 of muscle siding, U-shaped opening face is fitted in
On the web surface 10 of siding, the method that is formed, the following steps are included:
1, auxiliary prestress peen forming tooling connecting support is connected with lathe lower guideway, and makes the disconnected muscle of band muscle siding
Region is fallen into U-shaped piece of U-shaped opening, feeds U-shaped piece of the bolt pusher pre-bending magnitude for compressing web surface to setting, completes band muscle
The prestressing force clamping in the disconnected muscle region of siding；
Referring to attached drawing 1, saddle-shape will be pressed from both sides with integral panel 1 of the muscle integral panel part before contour peening by prestressing force
Tool 2 carries out rigid pre-bending, rib cause different in size contained by the integral panel, and rib breaks muscle muscle head not on same vertical plane,
In actual production, integral panel 1 breaks muscle region 4 it occur frequently that undesirable deformation, as shown in Fig. 2, should under prestressing force clamping
Shape mutation in region cannot be effectively controlled, and seriously affect the integrated prestress clamping state of siding and the forming that siding is final
Shape.Shown in Fig. 3, Fig. 4, Fig. 5, operator answers contour peening tooling 5 in the disconnected muscle region 4 installation area Duan Jin auxiliary in advance, and tooling connects
It connects 6 lower part of support and machine tool guideway 9 cooperates, be fixed on guide rail along guide rail sliding, realize the connection of tooling and lathe, and made
It is fallen into the U-shaped opening on U-shaped piece 7 of 6 top of connecting support with muscle siding muscle region 4 of breaking, feeding bolt 8 pushes U-shaped piece 7 compression abdomen
Plate face 10 completes the prestressing force clamping with the disconnected muscle region of muscle siding, eliminates and break outside muscle region shown in Fig. 2 to the pre-bending magnitude of setting
The case where shape is mutated occurs, and realizes the round and smooth state of integral panel prestressing force clamping shown in fig. 6.
2, disconnected muscle area surfaces partial region is protected with shot-peening protective glue band after prestressing force clamping
After disconnected muscle region prestressing force clamping is completed, chordwise shot-peening forming carried out to disconnected muscle region, it, need to be to disconnected before shot-peening
Muscle area surfaces partial region is protected, and specific region is as shown in Figure 7 close to disconnected muscle head zone, and specific size is as schemed
Shown: " to width 80mm, length is from disconnected muscle region midpoint 11 to the rectangular region of disconnected muscle head extension 100mm " uses shot-peening
Protective glue band is protected, and purpose bulge shape occurs after preventing the disconnected tangential shot-peening of muscle area surfaces, and it is whole to influence disconnected muscle region 4
External shape state.Due to the special construction in muscle region 4 of breaking, rib rigidity is successively decreased suddenly in disconnected muscle region 4, and the rigidity of covering is then
Far it is weaker than rib, therefore under the pre-stressed state of disconnected muscle region, biconvex shape namely bulge trend easily occurs in outer surface, if
Shot-peening is improper, which is just biconvex shape, transforms into shape to the later period and school shape brings extreme difficulties.Therefore, which sprays
Protection before ball is most important.
3, chordwise shot-peening forming is carried out to disconnected muscle area surfaces
Equipment employed in the chordwise shot-peening forming that this method is introduced be large-sized numerical control contour peening lathe (such as
MPR20000 numerical control contour peening lathe), then according to the technological design shot-peening path of entirety early period (according to tangential curvature cloud atlas
Tangential shot-peening path is drawn, in general, path is consistent with tangential curvature trend) carry out chordwise shot-peening forming.Shot-peening parameter
Selection need according to break muscle region curvature shape requirement formulate, generally use 90 ° of progress shot-peenings, pressure, bullet flow,
The parameters such as shot-peening distance, shot peening velocity, nozzle specification are chosen in basic test early period it has been determined that herein can be according to exhibition
It requires to be matched to curvature.
4, disconnected muscle region inner surface is opened up to contour peening
After the completion of chordwise shot-peening forming, the exhibition to disconnected muscle region is needed to select siding to contour peening, shot-peening position is carried out
Inner surface 12 breaks 13 shot-peening of muscle region rib two sides, as shown in Figure 8.Disconnected muscle region rib two sides are sprayed using elbow jet nozzles
Ball carries out rib two sides 13 rib two sides 13 can be made to deform to spanwise direction spray, is obtained and is opened up to shape with this,
In addition, rib two sides can be prevented to spray because of deformation caused by shot-peening is uneven.Fig. 8 is shown common one in this method
The specification of kind elbow jet nozzles 14, wherein shot-peening distance 80mm is best shot-peening distance.
The shot-peenings parameters such as pressure, bullet flow, shot peening velocity in single reinforcement part basic test early period it has been determined that
This can require to be matched according to spanwise curvature.
5, it opens up after shot-peening completion, lays down siding prestress clamp 2, siding is placed on receiver ga(u)ge and is carried out
Checking the configuration does not need to carry out shot-peening school shape, conversely, using ultrasonic wave if disconnected 4 shape of muscle region is bonded inspection template completely
Compressed air shotblasting machine carries out shot-peening school shape to disconnected 4 surfaces externally and internally of muscle region, judges tangential according to fit-state measurement or opens up to shape not
It meets the requirements, manual manipulation ultrasonic wave compressed air shotblasting machine is gradually bonded template and carries out tangential or open up to school shape, until finally meeting the requirements.
Shot-peening school shape described in this method is ultrasonic wave shot-peening school shape, can adjust school shape at any time according to topographies state
Parameter and region first carry out the protection zone in Fig. 7 to weaken shot-peening school shape, so that the tangential shape light in the region in general
It is suitable round and smooth, then judge that tangential perhaps open up is unsatisfactory for requiring and then carry out tangential or open up to school to shape according to fit-state
Shape, until finally meeting the requirements.
To solve realistic problem in production, the application is special, and way is, need to be according to rib before novel siding processing
Sectional dimension production corresponding construction disconnected muscle region aids prestress peen forming tooling, the stronger material of selection rigidity carries out
Processing and fabricating, and can realize its effective connection with machine tool guideway.In actual production, opened to 1 prestressing force clamping of integral panel
When the beginning, in the corresponding disconnected installation of muscle region 4 auxiliary prestress peen forming tooling 5, adjusted according to the height of rib to suitable
Position, while auxiliary prestress peen forming tooling 5 being fastenedly connected with machine tool guideway 9,1 prestressing force clamping of integral panel
While, the auxiliary in disconnected muscle region 4 is answered in advance by feeding bolt 10 realization adjusted in auxiliary prestress peen forming tooling 5
Power clamping, it is ensured that the disconnected muscle region 4 during prestressing force clamping of integral panel 1 is effectively controlled, and shape does not mutate,
The final round and smooth state for guaranteeing 1 prestressing force clamping of integral panel.
It is specifically intended that needing to measure in time outside disconnected muscle region 4 in auxiliary 5 installation process of prestress peen forming tooling
Outer surface string shown in 4 in the shape namely Fig. 7 on surface is opened up to shape, its string exhibition can be accurately measured by curvature instrument
To shape, prevent the disconnected excessive generation stress of 4 pre-bending of muscle region from concentrating.
This method is applied in practical projects, outside the curvature for preferably obtaining the disconnected muscle region of certain type machine
The feasibility of shape, this method is verified.
Claims (1)
- Muscle region prestress peen forming method, including an auxiliary prestress peen forming work 1. a kind of whole band muscle siding breaks Dress, it is characterised in that the auxiliary prestress peen forming tooling include connecting support, U-shaped piece, feed bolt, under connecting support Portion and machine tool guideway cooperate, and slide and can be fixed on guide rail along guide rail, U-shaped piece is fixed in connecting support, and U-shaped piece of center is set There is the tapped blind hole with feeding bolt, breaks muscle Town Card in U-shaped piece of U-shaped opening with muscle siding, U-shaped opening face is fitted in wall On the web surface of plate, the method that is formed, the following steps are included:1-1 will assist prestressing force forming frock connecting support to be connected with lathe lower guideway, and the disconnected muscle region of band muscle siding is fallen Enter in U-shaped piece of U-shaped opening, feed U-shaped piece of the bolt pusher pre-bending magnitude for compressing web surface to setting, it is disconnected to complete band muscle siding The prestressing force clamping in muscle region；Disconnected muscle area surfaces partial region is protected with shot-peening protective glue band after 1-2 prestressing force clamping1-3 carries out chordwise shot-peening forming to disconnected muscle area surfaces1-4 opens up to contour peening disconnected muscle region inner surface1-5 is opened up after shot-peening completion, lays down siding prestressing force clamping, siding is placed on receiver ga(u)ge outside carrying out Shape inspection does not need to carry out shot-peening school shape, conversely, spraying using ultrasonic wave if disconnected muscle region shape is bonded inspection template completely Ball machine carries out shot-peening school shape to disconnected muscle region surfaces externally and internally, judges tangential according to fit-state or opens up to shape and be unsatisfactory for wanting It asks, manual manipulation ultrasonic wave compressed air shotblasting machine is gradually bonded template and carries out tangential or open up to school shape, until finally meeting the requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910268574.XA CN110026907B (en) | 2019-04-03 | 2019-04-03 | Prestressed shot blasting forming method for broken rib area of integral ribbed wallboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910268574.XA CN110026907B (en) | 2019-04-03 | 2019-04-03 | Prestressed shot blasting forming method for broken rib area of integral ribbed wallboard |
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| CN110026907A true CN110026907A (en) | 2019-07-19 |
| CN110026907B CN110026907B (en) | 2021-04-20 |
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| CN201910268574.XA Active CN110026907B (en) | 2019-04-03 | 2019-04-03 | Prestressed shot blasting forming method for broken rib area of integral ribbed wallboard |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110549249A (en) * | 2019-08-02 | 2019-12-10 | 西安飞机工业（集团）有限责任公司 | Method for improving shot blasting forming rate of riveting type single-curvature wing wall plate |
| CN110666701A (en) * | 2019-09-20 | 2020-01-10 | 西安飞机工业（集团）有限责任公司 | Shot blasting forming method for small-area sharply bent biconvex ribbed wallboard |
| CN111112395A (en) * | 2020-01-03 | 2020-05-08 | 中国航空制造技术研究院 | Pre-bending tool for obtaining double-curvature wall plate and shot blasting forming process |
| CN111546017A (en) * | 2020-05-28 | 2020-08-18 | 上海工程技术大学 | Method for correcting and strengthening prestress of welded light alloy medium and heavy plates |
| CN111715739A (en) * | 2020-06-24 | 2020-09-29 | 中国航空制造技术研究院 | Pre-bending tool for integral wall plate with ribs and shot blasting forming method |
| CN111716255A (en) * | 2020-06-24 | 2020-09-29 | 中国航空制造技术研究院 | Pre-bending tool for ribbed wallboard and shot blasting forming method |
| CN111922922A (en) * | 2020-08-26 | 2020-11-13 | 中国航空制造技术研究院 | Shot peening strengthening deformation regulating and controlling method for large-curvature biconvex integral wall plate with ribs |
| CN114011958A (en) * | 2021-11-18 | 2022-02-08 | 中国航空制造技术研究院 | Shot blasting forming method for prolonging fatigue life of ribbed integral wallboard |
| CN114643318A (en) * | 2022-03-14 | 2022-06-21 | 中国航空制造技术研究院 | Prestress tool and shot blasting forming method for complex hyperbolic ribbed integral wall plate |
| CN116422509A (en) * | 2023-04-12 | 2023-07-14 | 广州市天滢卫浴科技有限公司 | Bathtub massage nozzle and installation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110549249A (en) * | 2019-08-02 | 2019-12-10 | 西安飞机工业（集团）有限责任公司 | Method for improving shot blasting forming rate of riveting type single-curvature wing wall plate |
| CN110666701A (en) * | 2019-09-20 | 2020-01-10 | 西安飞机工业（集团）有限责任公司 | Shot blasting forming method for small-area sharply bent biconvex ribbed wallboard |
| CN111112395B (en) * | 2020-01-03 | 2022-03-04 | 中国航空制造技术研究院 | Pre-bending tool for obtaining double-curvature wall plate and shot blasting forming process |
| CN111112395A (en) * | 2020-01-03 | 2020-05-08 | 中国航空制造技术研究院 | Pre-bending tool for obtaining double-curvature wall plate and shot blasting forming process |
| CN111546017A (en) * | 2020-05-28 | 2020-08-18 | 上海工程技术大学 | Method for correcting and strengthening prestress of welded light alloy medium and heavy plates |
| CN111546017B (en) * | 2020-05-28 | 2022-02-08 | 上海工程技术大学 | Method for correcting and strengthening prestress of welded light alloy medium and heavy plates |
| CN111715739A (en) * | 2020-06-24 | 2020-09-29 | 中国航空制造技术研究院 | Pre-bending tool for integral wall plate with ribs and shot blasting forming method |
| CN111716255A (en) * | 2020-06-24 | 2020-09-29 | 中国航空制造技术研究院 | Pre-bending tool for ribbed wallboard and shot blasting forming method |
| CN111716255B (en) * | 2020-06-24 | 2021-10-29 | 中国航空制造技术研究院 | Pre-bending tool for ribbed wallboard and shot blasting forming method |
| CN111922922A (en) * | 2020-08-26 | 2020-11-13 | 中国航空制造技术研究院 | Shot peening strengthening deformation regulating and controlling method for large-curvature biconvex integral wall plate with ribs |
| CN114011958A (en) * | 2021-11-18 | 2022-02-08 | 中国航空制造技术研究院 | Shot blasting forming method for prolonging fatigue life of ribbed integral wallboard |
| CN114011958B (en) * | 2021-11-18 | 2023-08-04 | 中国航空制造技术研究院 | Shot blasting forming method for prolonging fatigue life of ribbed integral wallboard |
| CN114643318A (en) * | 2022-03-14 | 2022-06-21 | 中国航空制造技术研究院 | Prestress tool and shot blasting forming method for complex hyperbolic ribbed integral wall plate |
| CN114643318B (en) * | 2022-03-14 | 2023-12-01 | 中国航空制造技术研究院 | Prestressing tool and shot blasting forming method for complex hyperbolic ribbed integral wallboard |
| CN116422509A (en) * | 2023-04-12 | 2023-07-14 | 广州市天滢卫浴科技有限公司 | Bathtub massage nozzle and installation method thereof |
| CN116422509B (en) * | 2023-04-12 | 2023-11-10 | 广州市天滢卫浴科技有限公司 | Bathtub massage nozzle and installation method thereof |
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