A large aspect ratio special-shaped shell rotary inner cavity spraying general tool

Abstract

The utility model relates to a kind of general tool of large long diameter ratio special-shaped shell rotary inner chamber spraying, including tool table, annular support and compensation mechanism, two annular supports are fixedly installed in the tool table, the annular support top is uniformly distributed with three compensation mechanisms, large long diameter ratio special-shaped shell is penetrated two disc inner hole, is placed into tool table, by rotating adjusting lever and drive adjusting seat close to shell, wherein adjusting lever is screw-mounted with fixed seat, to realize the mobile adjustment of adjusting seat, multiple movable column is equipped on the side of adjusting seat, multiple column is equipped with abutting head close to shell body one end, abutting head is attached to shell surface, since shell is special-shaped shell, the deformation amount of multiple column end is not one after contacting shell, column moves in circular groove, and ring body moves, ring body moves will extrude spring, and abutting head one end is equipped with rubber layer cover, and is attached to shell, increase friction, protect shell surface.

Description

Technical Field

[0001] This utility model relates to the field of fixtures for fixing irregularly shaped shells, specifically a universal fixture for spraying the inner cavity of irregularly shaped shells with a large length-to-diameter ratio. Background Technology

[0002] In modern high-end equipment manufacturing industries, such as aerospace, automobile manufacturing, and precision instruments, the application of large aspect ratio irregularly shaped shell rotating internal cavity parts is becoming increasingly widespread. Conventional positioning methods are limited by the structural characteristics of the parts and are difficult to achieve fast and accurate alignment, resulting in a high scrap rate.

[0003] For parts with large aspect ratio irregular shells and rotating inner cavities, they need to be fixed to the turntable during spraying. The large aspect ratio of the irregular shell makes clamping very difficult. The rigidity of the tooling and the product is not good when rotating. Due to the limitations of the product length and the spray gun length, the product generally needs to be flipped for clamping and spraying. Existing tooling is not easy to position and clamp irregular shells. Therefore, we need to provide a universal tooling for spraying rotating inner cavities of irregular shells with large aspect ratio. Utility Model Content

[0004] The purpose of this utility model is to provide a universal tooling for spraying the inner cavity of a large aspect ratio irregular shell. The tooling table is provided with two annular supports. The top and bottom of the worktable are provided with round holes for inserting the large aspect ratio irregular shell. A compensation mechanism is provided on the surface of the annular supports, which can increase the contact area of ​​the large aspect ratio irregular shell surface, making the fixation more secure and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a universal tooling for spraying the inner cavity of a large aspect ratio irregularly shaped shell, comprising:

[0006] The tooling table, the ring brackets, and the compensation mechanism are provided. Two ring brackets are fixedly installed inside the tooling table. Three compensation mechanisms are evenly distributed on the top of the ring brackets to increase the contact area of ​​the irregularly shaped shell surface.

[0007] The compensation mechanism includes a fixed base, an adjusting rod, an adjusting seat, and a fitting component. The fixed base is fixed to the top of the annular bracket by bolts. The adjusting rod is threaded inside the fixed base. One end of the adjusting rod is rotatably mounted with the adjusting seat. The fitting component is installed on the surface of the adjusting seat and is used to fit and compress the surface of the irregularly shaped shell.

[0008] Preferably, the fitting component includes a circular groove, a column, a spring, a ring, and an abutment. The adjusting seat has several circular grooves, a column is slidably installed in the circular groove, a ring is fixedly installed on the surface of the column, a spring is provided between the ring and the circular groove, and the spring is movably sleeved on the surface of the column. The abutment is used to fix the several columns.

[0009] Preferably, one end of each of the aforementioned columns passes through one side of the adjustment seat and is provided with an abutment seat.

[0010] Preferably, the abutment includes a mounting hole, a mounting bolt, and an abutment head. The mounting hole is provided at one end of the column, and the mounting bolt is threaded into the mounting hole. The abutment head is fixedly installed at one end of the mounting bolt.

[0011] Preferably, a rubber sleeve is fixedly installed at one end of the contact head.

[0012] Preferably, the abutting member includes a push plate, a push rod, a pressure seat, and a groove. The top of each of the several circular grooves is connected to the groove. The pressure seat that fixes the column is provided in the groove. The top of the pressure seat is fixedly installed with a push rod. One end of each of the push rods passes through one side of the adjusting seat and is fixedly installed with a push plate.

[0013] Preferably, one side of the adjusting seat is provided with an adjusting component for adjusting the movement of the push plate. The adjusting component includes a fixing frame, an adjusting bolt and a protective sleeve. The fixing frame is fixed to one side of the adjusting seat, and the adjusting bolt is installed with an internal thread. One end of the adjusting bolt is rotatably installed with the surface of the push plate, and the protective sleeve is fitted onto the surface of the adjusting bolt.

[0014] Preferably, a protective cover is fixedly installed on the surface of the adjusting seat, and the surface of the protective cover is slidably installed inside the fixed seat. The protective cover is used to protect the adjusting rod.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model features two annular supports within the tooling table. The top and bottom of the worktable have circular holes for inserting irregularly shaped shells with large aspect ratios. A compensation mechanism is provided on the surface of the annular supports, increasing the contact area with the irregularly shaped shell and making the fixation more secure. Through the annularly distributed compensation mechanism, the tooling can automatically adjust its contact position according to the irregular surface of the shell. Each compensation mechanism's column can independently extend and retract under the action of a spring, providing flexible contact in conjunction with the rubber sleeve of the contact head, significantly increasing the contact area with the shell surface, avoiding the localized stress concentration problem of traditional rigid tooling, and effectively protecting the integrity of the shell surface. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a partial three-dimensional structural view of the present invention;

[0019] Figure 3 This is a perspective view of the compensation mechanism of this utility model;

[0020] Figure 4This is a perspective view of the bonding component of this utility model;

[0021] Figure 5 This is a perspective view of the contact seat of this utility model;

[0022] Figure 6 This is a three-dimensional sectional view of the adjustment seat of this utility model.

[0023] In the diagram: 1. Tooling table; 2. Ring bracket; 3. Compensation mechanism; 31. Fixed seat; 32. Adjusting rod; 33. Adjusting seat; 34. Fitting part; 341. Circular groove; 342. Column; 343. Spring; 344. Ring; 4. Abutting part; 41. Push plate; 42. Push rod; 43. Pressing seat; 44. Groove; 5. Abutting seat; 51. Mounting hole; 52. Mounting bolt; 53. Abutting head; 6. Rubber sleeve; 7. Adjusting part; 71. Fixed frame; 72. Adjusting bolt; 73. Protective sleeve; 8. Protective cover. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6 This utility model provides a technical solution: a universal tooling for spraying the inner cavity of a large aspect ratio irregularly shaped shell, comprising:

[0026] The tooling table 1, the ring bracket 2, and the compensation mechanism 3 are fixedly installed inside the tooling table 1. Three compensation mechanisms 3 are evenly distributed on the top of the ring bracket 2 to increase the contact area of ​​the irregular shell surface.

[0027] The compensation mechanism 3 includes a fixed seat 31, an adjusting rod 32, an adjusting seat 33, and a fitting component 34. The fixed seat 31 is fixed to the top of the annular bracket 2 by bolts. The adjusting rod 32 is installed inside the fixed seat 31 by internal threads. The adjusting seat 33 is rotatably installed at one end of the adjusting rod 32. The fitting component 34 is installed on the surface of the adjusting seat 33 and is used to fit and compress the surface of the irregular shell.

[0028] Specifically, two annular supports 2 are provided in the tooling table 1. The top and bottom of the worktable are provided with round holes for the insertion of irregular shells with large length-to-diameter ratios. Compensation mechanisms 3 are provided on the surface of the annular supports 2, which can increase the contact area of ​​the irregular shells with large length-to-diameter ratios, making the fixation more secure. Through the annularly distributed compensation mechanisms 3, the tooling can automatically adjust the contact position according to the irregular surface of the irregular shell. The column 342 of each compensation mechanism 3 can extend and retract independently under the action of spring 343, and provide flexible contact with the rubber sleeve 6 of the contact head 53, which significantly increases the contact area with the shell surface, avoids the problem of local stress concentration of traditional rigid tooling, and effectively protects the integrity of the shell surface.

[0029] The layout design of two annular supports 2 and multiple sets of compensation mechanisms 3 allows the tooling to adapt to irregularly shaped shells with large length-to-diameter ratios and different sizes and curvatures. The dual adjustment mechanism of the adjusting rod 32 and the adjusting bolt 72 allows the tooling to quickly adjust the inner diameter range to meet the clamping needs of diverse products;

[0030] The elastic design of the fitting part 34, combined with the modular structure of the abutment seat 5, provides reliable friction to prevent the housing from rotating or shifting, and the holding force can be precisely controlled by the adjusting part 7 to ensure that the thin-walled irregular part does not deform during the spraying process.

[0031] The fitting component 34 includes a circular groove 341, a column 342, a spring 343, a ring 344, and a contact component 4. The adjusting seat 33 has several circular grooves 341. The column 342 is slidably installed in the circular grooves 341. The ring 344 is fixedly installed on the surface of the column 342. The spring 343 is provided between the ring 344 and the circular groove 341, and the spring 343 is movably sleeved on the surface of the column 342. The contact component 4 is used to fix the several columns 342.

[0032] Furthermore, the column 342 is made of high-strength alloy steel, and its surface is precision ground to a roughness controlled below Ra0.8μm, in order to reduce the frictional resistance between it and the inner wall of the circular groove 341, making the sliding of the column 342 more flexible. The length of the column 342 is determined according to the thickness of the adjusting seat 33 and the possible deformation of the irregularly shaped shell. The ring 344 and the column 342 are made using an integrated forging process to ensure connection strength. The outer diameter of the ring 344 is slightly smaller than the inner diameter of the circular groove 341, allowing it to slide freely within the circular groove 341. The thickness of the ring 344 is 3-5mm, ensuring that it has sufficient rigidity to transmit the force of the spring 343. When the column 342 is compressed by the irregularly shaped shell, the ring 344 moves into the circular groove 341 along with the column 342, thereby compressing the spring 343. The elastic potential energy of the spring 343 is converted into a reaction force on the column 342, causing the column 342 to always tend to move towards the irregularly shaped shell. This ensures that the column 342 can fit tightly against the surface of the irregularly shaped shell. The abutment 4 plays a fixing role after the column 342 is in place with the surface of the irregularly shaped shell. By locking the column 342, it prevents the position of the column 342 from changing due to tooling vibration or shell stress during the spraying process, ensuring the stability of the fit. In the unlocked state, a certain gap is maintained between the abutment 4 and the column 342, which does not affect the free expansion and contraction of the column 342, so that the column 342 can adaptively adjust according to the surface shape of the irregularly shaped shell.

[0033] Several columns 342 each have one end that passes through one side of the adjusting seat 33 and are provided with a contact seat 5;

[0034] In this design, one end of several columns 342 penetrates one side wall of the adjusting seat 33 and extends to the outside, forming movable contact ends. The penetration point between the columns 342 and the adjusting seat 33 adopts a sliding seal design, and the sealing ring prevents paint from seeping into the interior of the circular groove 341 during the spraying process. When the adjusting seat 33 moves towards the irregularly shaped shell, the contact seats 5 at the ends of the columns 342 first contact the surface of the shell. Due to the irregular shape of the shell, each column 342 extends and retracts independently under the action of the spring 343 until all contact seats 5 are in contact with the surface of the shell.

[0035] The abutment 5 includes a mounting hole 51, a mounting bolt 52, and an abutment head 53. One end of the column 342 is provided with a mounting hole 51, and a mounting bolt 52 is installed in the internal thread of the mounting hole 51. An abutment head 53 is fixedly installed at one end of the mounting bolt 52.

[0036] It is worth noting that the mounting hole 51 of the abutment seat 5 is opened at the center of the end of the column 342, and the internal thread specification forms a standard thread pair connection with the mounting bolt 52. By tightening the mounting bolt 52, the abutment head 53 of different shapes, such as spherical, conical, and flat, can be quickly replaced to adapt to different types of irregular shells. The modular design allows the tooling to quickly replace the abutment head 53.

[0037] A rubber sleeve 6 is fixedly installed at one end of the contact head 53;

[0038] The rubber sleeve 6 is made of silicone rubber or nitrile rubber with a high coefficient of friction. The rubber sleeve 6 is bonded to the contact head 53 through a vulcanization process or a strong adhesive, such as epoxy resin. When the rubber sleeve 6 contacts the outer shell surface, it undergoes elastic deformation to fill microscopic unevenness.

[0039] The abutting component 4 includes a push plate 41, a push rod 42, a pressing seat 43 and a groove 44. The top of several circular grooves 341 are all connected to the groove 44. The pressing seat 43 that fixes the column 342 is provided in the groove 44. The push rod 42 is fixedly installed on the top of the pressing seat 43. One end of several push rods 42 passes through one side of the adjusting seat 33 and is fixedly installed with the push plate 41.

[0040] It should be noted that the push plate 41 and the pressure seat 43 are welded together by a short plate to form an integral moving part. When the push plate 41 is driven by the adjusting bolt 72, the short plate drives the pressure seat 43 to move synchronously. The arc surface of the pressure seat 43 gradually fits into the surface of the column 342, and the position of the column 342 is locked by friction.

[0041] The adjusting seat 33 is provided with an adjusting component 7 on one side for adjusting the movement of the push plate 41. The adjusting component 7 includes a fixing frame 71, an adjusting bolt 72 and a protective sleeve 73. The fixing frame 71 is fixed on one side of the adjusting seat 33. The adjusting bolt 72 is installed inside the fixing frame 71 with a thread. One end of the adjusting bolt 72 is rotatably installed with the surface of the push plate 41. The protective sleeve 73 is sleeved on the surface of the adjusting bolt 72.

[0042] Specifically, when rotating the adjusting bolt 72, the push plate 41 moves linearly under the constraint of the fixed frame 71. The sleeve 73 is made of rubber or plastic and is fitted on the outside of the adjusting bolt 72 to prevent paint or dust from entering the threads and extend service life. The mechanical self-locking design ensures that the locking force remains stable in a vibration environment. The protection of the sleeve 73 extends the maintenance cycle of the threaded pair from once a week to once a month.

[0043] A protective cover 8 is fixedly installed on the surface of the adjusting seat 33. The surface of the protective cover 8 is slidably installed inside the fixed seat 31. The protective cover 8 is used to protect the adjusting rod 32.

[0044] The protective cover 8 is installed on one side of the adjusting seat 33 and slides within the fixed seat 31. It can limit the movement of the adjusting seat 33, prevent the adjusting seat 33 from rotating with the adjusting rod 32, and protect the adjusting rod 32 to reduce the amount of debris falling onto the surface of the adjusting rod 32.

[0045] All threaded mounting surfaces in this application utilize a modified triangular thread with a self-locking function. The thread helix angle is designed to be 1.5°-2.5° to enhance the anti-loosening effect. After phosphating, the thread surface is coated with an 8-12μm Dacromet coating and impregnated with silicone sealant to form a sealing layer, resulting in excellent corrosion resistance. In addition, the thread can effectively expel dust, and it can still be used normally even if a small amount of dust adheres to it.

[0046] The fixture 1 of this device includes two discs with circular holes, which are fixed together by annularly distributed support rods. Two annular supports 2 are provided on the surface of the annularly distributed support rods, and three sets of compensation mechanisms 3 are evenly distributed on the top of the annular supports 2. A large aspect ratio irregularly shaped shell is inserted into the circular holes of the two discs and placed into the fixture 1. Rotating the adjusting rod 32 moves the adjusting seat 33 closer to the shell. The adjusting rod 32 is threadedly installed with the fixed seat 31 to achieve the movement adjustment of the adjusting seat 33. Multiple movable columns 342 are provided on one side of the adjusting seat 33. Each column 342 has a contact head 53 near the shell surface. The contact head 53 fits against the shell surface. Because the shell is irregularly shaped, the deformation of the columns 342 after contact with the shell is significant. The column 342 moves within the circular groove 341, causing the ring 344 to move. The movement of the ring 344 compresses the spring 343. One end of the contact head 53 is provided with a rubber sleeve 6, which fits against the outer shell to increase friction and protect the surface of the outer shell. After multiple contact heads 53 are fitted against the outer shell, the adjusting bolt 72 is rotated to move the push plate 41 downward. Multiple push rods 42 at the bottom of the push plate 41 respectively move the pressure seat 43 at its bottom downward. The arc-shaped surface at the bottom of the pressure seat 43 is a rubber surface, which compresses and fixes the column 342, thus limiting the position of the column 342. Multiple columns 342 can be fixed by moving one push plate 41. The mounting hole 51 at one end of the column 342 is threaded onto the mounting bolt 52 on one side of the contact head 53, which facilitates the replacement of the contact head 53.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A universal tooling for spraying coating on a rotating inner cavity of an irregularly shaped shell with a large aspect ratio, characterized in that, include: Tooling table (1), ring bracket (2) and compensation mechanism (3). Two ring brackets (2) are fixedly installed inside the tooling table (1). Three compensation mechanisms (3) are evenly distributed on the top of the ring brackets (2) to increase the contact area of ​​the irregular shell surface. The compensation mechanism (3) includes a fixed seat (31), an adjusting rod (32), an adjusting seat (33), and a fitting component (34). The fixed seat (31) is fixed to the top of the annular bracket (2) by bolts. The adjusting rod (32) is threaded inside the fixed seat (31). The adjusting seat (33) is rotatably mounted on one end of the adjusting rod (32). The fitting component (34) is installed on the surface of the adjusting seat (33) and is used to fit and press the irregularly shaped shell surface.

2. The universal tooling for spraying the inner cavity of a large aspect ratio irregularly shaped shell with a rotating cavity according to claim 1, characterized in that: The fitting component (34) includes a circular groove (341), a column (342), a spring (343), a ring (344), and a contact component (4). The adjusting seat (33) has several circular grooves (341). A column (342) is slidably installed in the circular groove (341). A ring (344) is fixedly installed on the surface of the column (342). A spring (343) is provided between the ring (344) and the circular groove (341), and the spring (343) is movably sleeved on the surface of the column (342). The contact component (4) is used to fix several columns (342).

3. The universal tooling for spraying the inner cavity of a large aspect ratio irregularly shaped shell with a rotating cavity according to claim 2, characterized in that: One end of each of the aforementioned columns (342) passes through one side of the adjusting seat (33) and is provided with an abutment seat (5).

4. The universal tooling for spraying the inner cavity of a large aspect ratio irregularly shaped shell with a rotating cavity according to claim 3, characterized in that: The abutment (5) includes a mounting hole (51), a mounting bolt (52), and an abutment head (53). The column (342) has a mounting hole (51) at one end, and a mounting bolt (52) is threaded into the mounting hole (51). An abutment head (53) is fixedly installed at one end of the mounting bolt (52).

5. The universal tooling for spraying the inner cavity of a large aspect ratio irregularly shaped shell with a rotating cavity according to claim 4, characterized in that: A rubber sleeve (6) is fixedly installed at one end of the contact head (53).

6. The universal tooling for spraying the inner cavity of a large aspect ratio irregularly shaped shell with a rotating cavity according to claim 2, characterized in that: The contacting element (4) includes a push plate (41), a push rod (42), a holding seat (43), and a groove (44). The top of several circular grooves (341) are all connected to the groove (44). The groove (44) is provided with a holding seat (43) for fixing the column (342). The top of the holding seat (43) is fixedly installed with a push rod (42). One end of several push rods (42) passes through one side of the adjusting seat (33) and is fixedly installed with a push plate (41).

7. The universal tooling for spraying the inner cavity of a large aspect ratio irregularly shaped shell with a rotating cavity according to claim 1, characterized in that: The adjusting seat (33) is provided with an adjusting component (7) for adjusting the movement of the push plate (41) on one side. The adjusting component (7) includes a fixing frame (71), an adjusting bolt (72) and a protective sleeve (73). The fixing frame (71) is fixed on one side of the adjusting seat (33). The adjusting bolt (72) is installed inside the fixing frame (71) with a thread. One end of the adjusting bolt (72) is rotatably installed on the surface of the push plate (41). The protective sleeve (73) is sleeved on the surface of the adjusting bolt (72).

8. The universal tooling for spraying the inner cavity of a large aspect ratio irregularly shaped shell with a rotating cavity according to claim 1, characterized in that: A protective cover (8) is fixedly installed on the surface of the adjusting seat (33). The surface of the protective cover (8) is slidably installed inside the fixed seat (31). The protective cover (8) is used to protect the adjusting rod (32).

Images