A flexible clamping device and method for machining the inner cavity of a cabin body on a production line

Abstract

A kind of inner cavity processing flexible clamping device for cabin production line, comprising: quick-change module, positioning module, axial compression module, auxiliary support module, annular frame, two guide blocks.Positioning module, annular frame are connected with quick-change module, axial compression module is installed on the upper end surface of annular frame, auxiliary support module is installed in the middle part of annular frame, first guide block is installed on the upper inner side of annular frame, second guide block is installed on positioning module, cabin is loaded by first guide block and second guide block and is positioned by positioning module, then axial compression is realized by axial compression module, finally radial support is realized by auxiliary support module, and then the accurate positioning and reliable clamping of cabin are realized.The present application can realize the transfer, clamping, compression function of multiple specifications of cabin in production line, with the advantages of strong product versatility, compact structure and easy operation.

Description

Technical Field

[0001] This invention relates to production line clamping devices in the field of aerospace technology, specifically a flexible clamping device for internal cavity processing in a cabin production line. Background Technology

[0002] The cabin is cast from magnesium alloy. After casting, the interior of the cabin needs to be machined, including removing excess material to reduce weight and machining the mounting surfaces. Different cabins have different dimensions, with the longest being approximately 800mm and the smallest inner diameter being approximately 250mm.

[0003] Due to the long length and small inner diameter of the cabin, existing machine tools on the market cannot meet the requirements for machining the internal surfaces. Currently, cabin machining is mainly carried out using a single dedicated machine tool, with clamping using a chuck and center rest. The clamping method is manual and requires multiple people to cooperate, resulting in low efficiency, cumbersome operation, and high labor intensity. Summary of the Invention

[0004] The technical problem solved by the present invention is to overcome the shortcomings of the prior art and, in order to meet the needs of automatic flow and processing of cabin production lines, to provide a flexible clamping device and method for internal cavity processing of cabin production lines, so as to realize the processing of the internal surface of cabins.

[0005] The technical solution of this invention is:

[0006] Firstly,

[0007] This invention proposes a flexible clamping device for internal cavity processing in a cabin production line, comprising: a quick-change module, a positioning module, an axial clamping module, an auxiliary support module, an annular frame, a first guide block, and a second guide block;

[0008] The positioning module and the annular frame are both fixedly installed on the quick-change module. The first guide block is installed on the upper part of the inner side of the annular frame, and the second guide block is installed on the positioning surface of the positioning module. The cabin is loaded through the first guide block and the second guide block and positioned by the positioning module. An auxiliary support module is provided in the middle of the inner side of the annular frame to provide radial support for the cabin. The axial compression module is installed on the top end face of the annular frame to achieve axial compression of the cabin.

[0009] Furthermore, the quick-change module includes: a coupling, a quick-change base plate, a pull stud, an identification chip, and a quick-change base;

[0010] The coupling is mounted on the side of the quick-change base plate by lateral and bottom screws, and is used to connect with the robot to realize the movement of the flexible clamping device for internal cavity processing. The quick-change base is clamped on the lathe, and the pull stud is connected to the quick-change base plate by screws to realize the connection between the quick-change base plate and the quick-change base. The identification chip is fixed to the side of the quick-change base plate by screws, and is used for product number identification in the production line and for feedback control of machine tool door opening and closing after identification.

[0011] Furthermore, the positioning module includes: a positioning ring and a quick-change positioning pin assembly;

[0012] The quick-change positioning pin assembly is positioned by a shaft hole and fixed to the positioning ring by screws, allowing for quick replacement according to the needs of different compartments; the positioning ring is fixed to the quick-change base plate;

[0013] The upper surface of the positioning ring is engraved with lines to indicate different cabin installation angles;

[0014] The positioning ring is designed with a circumferential hollow structure to facilitate the smooth discharge of chips and prevent chip blockage.

[0015] Furthermore, the quick-change positioning pin assembly includes: a pin seat, a positioning pin, a spring, a screw plug, and a set screw;

[0016] The screw plug is connected to the bottom thread of the pin seat by a thread, the positioning pin is engaged with the pin hole of the pin seat, and a spring is provided between the positioning pin and the screw plug, and the spring force is adjusted by the screw plug.

[0017] The positioning pin has a guide groove, extends and retracts axially and is fixed by a set screw, thereby enabling rapid switching according to the needs of different compartments. When producing compartment A, the positioning pins corresponding to the other compartments are retracted into the pin seat and fixed with set screws. Then, the positioning pin corresponding to compartment A is extended and fixed with a set screw.

[0018] Furthermore, the axial clamping module includes: a hook-shaped clamping mechanism, a height adjusting rod, and a clamping ring;

[0019] The hook-shaped clamping mechanism presses the clamping ring with a pressure plate, ensuring that the clamping force is evenly applied to the cabin through the clamping ring; the upper pressure plate of the hook-shaped clamping mechanism can rotate 360° for easy clamping; the height adjustment rod is connected to the hook-shaped clamping mechanism, and the upper pressure plate of the hook-shaped clamping mechanism can extend and retract axially. By using height adjustment rods of different heights and coordinating with the axial extension and retraction stroke of the hook-shaped clamping mechanism, it can adapt to the clamping of cabins of different heights.

[0020] Furthermore, the auxiliary support module includes: a handle, an auxiliary support mechanism, a soft claw, a rubber pad, and a handle;

[0021] The soft claw is installed on the output shaft of the auxiliary support mechanism, and a rubber pad is fixed on the soft claw to increase the contact area with the side wall of the cabin without damaging the cabin. The handle is connected to the auxiliary support mechanism to facilitate the retraction of the output shaft. A high-elasticity spring is installed inside the auxiliary support mechanism to pop out the output shaft. The auxiliary support mechanism has a cam mechanism inside, and the output shaft is locked by the handle.

[0022] Furthermore, the ring frame is an integral ring frame structure, and the material is 7075 aluminum alloy.

[0023] Furthermore, the first guide block and the second guide block are made of nylon rubber, which is used for coarse positioning of the cabin to achieve rapid installation guidance of the cabin. The guide diameter is the cabin diameter D + (1~2) mm.

[0024] Secondly,

[0025] The present invention also proposes a clamping method for machining the inner cavity of a cabin production line based on the aforementioned flexible clamping device for inner cavity machining, comprising the following steps:

[0026] S1. The robot transports the flexible clamping device for internal cavity processing to the installation station via a coupling and then leaves.

[0027] S2. The cabin body is transferred from the previous process in the logistics system to the installation station;

[0028] S3. Extend the positioning pin on the corresponding positioning module of the cabin and retract the remaining positioning pins into the hole;

[0029] S4. Retract and lock the auxiliary support module;

[0030] S5. Turn the pressure plate of the hook-shaped clamping mechanism to the outside;

[0031] S6. Align the hull positioning hole with the positioning pin on the positioning ring of the positioning module;

[0032] S7. Insert the cabin along the first guide block and the second guide block and guide it into the pin;

[0033] S8. Place the clamping ring on the cabin;

[0034] S9. The pressure plate of the hook-shaped clamping mechanism symmetrically and evenly clamps the clamping ring to achieve axial clamping of the cabin.

[0035] S10. Loosen the handle of the auxiliary support module, and after the soft claws fit into the cabin, lock the auxiliary support module with the handle to achieve radial support of the cabin;

[0036] S11. The robot uses a coupling to remove the tooling with the installed cabin from the installation station and transport it to the machine tool door.

[0037] S12. The barcode scanner outside the machine tool door scans the identification chip on the quick-change substrate;

[0038] S13. After the machine tool door opens automatically, the robot connects the tooling to the zero-point quick-change base on the machine tool worktable via a pull stud.

[0039] S14. After the robot releases the coupling, it leaves the machine tool and moves to the designated position.

[0040] S15. Execute the processing procedure and perform cabin processing.

[0041] The advantages of this invention compared to the prior art are:

[0042] (1) The flexible clamping device of the present invention is equipped with a clamping module with adjustable axial height at the top. By replacing the height adjustment rod, it can be compatible with the processing of cabins of different heights, thus improving the versatility of the equipment.

[0043] (2) The bottom quick-change module of the flexible clamping device of the present invention is designed with a quick-change interface and a coupling on the side wall, which can automatically rotate, clamp, fix and process in the cabin production line, eliminating manual operation and improving production efficiency; at the same time, the design of the quick-change module realizes the rapid change of different cabin processing.

[0044] (3) The positioning pin on the positioning ring of the present invention is a telescopic structure. When in use, the positioning pin extends and is fixed. After use, it can be retracted and locked, which is compatible with the positioning requirements of the end face of different specifications of the cabin, realizes the rapid changeover of the production line, and improves the changeover efficiency.

[0045] (4) The positioning ring sidewall of the present invention is designed with a chip removal port. Since the machining of the internal cavity of the cabin will generate a large number of chips that are difficult to remove, the chip removal port of the positioning ring can solve this problem. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the flexible clamping device for internal cavity processing of the present invention;

[0047] Figure 2 This is a flowchart illustrating the operation of the flexible clamping device of the present invention.

[0048] Figure 3 This is a schematic diagram of the quick-change module and the positioning module of the present invention, wherein... Figure 3 'a' is a 3D diagram. Figure 3 b is a sectional view;

[0049] Figure 4 This is a schematic diagram of the quick-change positioning pin assembly in the positioning module of the present invention, wherein... Figure 4 'a' is a sectional view. Figure 4 b is a 3D diagram;

[0050] Figure 5This is a schematic diagram of the auxiliary support module of the present invention;

[0051] In the diagram: 1 is the quick-change module, 2 is the positioning module, 3 is the axial clamping module, 4 is the auxiliary support module, 5 is the ring frame, 6 is the first guide block, 7 is the second guide block, 8 is the cabin, 9 is the coupling, 10 is the quick-change base plate, 11 is the pull pin, 12 is the identification chip, 13 is the quick-change base, 14 is the positioning ring, 15 is the quick-change positioning pin assembly, 16 is the pin seat, 17 is the positioning pin, 18 is the spring, 19 is the screw plug, 20 is the set screw, 21 is the hook-shaped clamping mechanism, 22 is the height adjustment rod, 23 is the clamping ring, 24 is the handle, 25 is the auxiliary support mechanism, 26 is the soft claw, 27 is the rubber pad, and 28 is the handle. Detailed Implementation

[0052] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0053] In this embodiment of the invention, the outer diameter of the cabin 1 is Φ340mm, the total length is 586mm, the thinnest wall thickness is 2.5mm, and the material of the parts is cast magnesium alloy. The outer diameter of the cabin 2 is Φ340mm, the minimum inner diameter is 335mm, and the total length is 640mm.

[0054] See Figure 1 The present invention provides a flexible clamping device for internal cavity processing in a cabin production line, comprising a quick-change module 1, a positioning module 2, an axial pressing module 3, an auxiliary support module 4, an annular frame 5, a first guide block 6, and a second guide block 7.

[0055] The positioning module 2 and the annular frame 5 are both fixedly installed on the quick-change module 1. The first guide block 6 is installed on the upper part of the inner side of the annular frame 5, and the second guide block 7 is installed on the positioning surface of the positioning module 2. The cabin 8 is loaded through the first guide block 6 and the second guide block 7 and positioned by the positioning module 2. An auxiliary support module 4 is provided in the middle of the inner side of the annular frame 5 to provide radial support for the cabin 8. The axial pressing module 3 is installed on the top end face of the annular frame 5 to achieve axial pressing of the cabin 8, thereby achieving accurate positioning and reliable clamping of the cabin 8.

[0056] See Figure 1 and Figure 3 The quick-change module 1 includes a coupling 9, a quick-change base plate 10, a pull stud 11, an identification chip 12, and a quick-change base 13;

[0057] The coupling 9 is connected to the quick-change base plate 10 by side and bottom screws; the pull stud 11 is connected to the quick-change base plate 10 by screws; the identification chip 12 is fixed on the quick-change base plate 10 by screws and is located in the upper right position of the coupling 9, and is used for product number identification in the production line and for feedback control of machine tool door opening and closing after identification.

[0058] See Figure 3 The positioning module 2 includes a positioning ring 14 and a quick-change positioning pin assembly 15.

[0059] The quick-change positioning pin assembly 15 is positioned by a shaft hole and connected to the positioning ring 14 by screws, which can be quickly replaced according to the needs of different products; the upper surface of the positioning ring 14 is engraved with lines to indicate different chamber installation angles; the positioning ring 14 is designed with a circumferential hollow structure to facilitate the smooth discharge of chips and prevent chip blockage.

[0060] See Figure 4 The quick-change positioning pin assembly includes a pin seat 16, a positioning pin 17, a spring 18, a screw plug 19, and a set screw 20.

[0061] The screw plug 19 is threaded to the bottom of the pin seat 16, and the spring force can be adjusted by the screw plug; the positioning pin 17 is engaged with the pin hole of the pin seat 16, and has a guide groove, which can extend and retract axially and be fixed by the set screw 20, so as to realize quick switching according to the needs of different compartments. When producing compartment A, the positioning pins corresponding to the other compartments are retracted into the pin seat and fixed with set screws, and then the positioning pins corresponding to compartment A are extended and fixed with set screws.

[0062] See Figure 1 The axial clamping module 3 includes a hook-shaped clamping mechanism 21, a height adjusting rod 22, and a clamping ring 23. The hook-shaped clamping mechanism 21 presses against the clamping ring 23 through a pressure plate to ensure that the clamping force is evenly applied to the cabin. The pressure plate of the hook-shaped clamping mechanism 21 can rotate 360° for easy clamping. The height adjusting rod 22 is connected to the hook-shaped clamping mechanism 21, and the pressure plate of the hook-shaped clamping mechanism can extend and retract axially. By using height adjusting rods of different heights and coordinating with the axial extension and retraction stroke of the hook-shaped clamping mechanism, it can adapt to the clamping of cabins of different heights. For example, when cabin 1 is switched to cabin 2, the axial clamping of cabin 2 can be achieved by replacing the 30mm height adjusting rod with an 80mm height adjusting rod.

[0063] See Figure 5 The auxiliary support module 4 includes: handle 24, auxiliary support mechanism 25, soft claw 26, rubber pad 27 and handle 28.

[0064] The soft claw 26 is connected to the output shaft on the auxiliary support mechanism 25, and a rubber pad 27 is fixed on the soft claw to increase the contact area without damaging the cabin. The handle 24 is connected to the auxiliary support mechanism 25 to facilitate the retraction of the output shaft. A high-elasticity spring is installed inside the auxiliary support mechanism 25 to eject the output shaft. The auxiliary support has a cam mechanism inside, and the output shaft can be easily locked via the handle 28.

[0065] See Figure 1 The ring frame 5 is an integral ring frame structure made of 7075 aluminum alloy. This aluminum alloy is a high-strength aluminum alloy with strength close to that of steel and a density that is 1 / 3 that of steel. It has a higher specific stiffness. At the same time, the integral ring frame structure has better rigidity and seismic resistance compared to the traditional split column form.

[0066] See Figure 1 The first guide block 6 and the second guide block 7, with a guide diameter of 346mm, are used for coarse positioning of the cabin to achieve rapid installation guidance of the cabin. The material is nylon rubber to avoid damaging the cabin during installation.

[0067] Figure 2 This is a flowchart of the flexible clamping device provided in this embodiment of the invention. The robot connects to the tooling in the line-side warehouse via a coupling, transports it to the installation station, and then leaves. The cabin is transferred to the installation station through the previous process in the logistics system. The corresponding positioning pin of the cabin is extended, and the remaining positioning pins are retracted into the holes. The auxiliary support module is retracted and locked. The hook-shaped clamping plate is rotated to the outside. The positioning holes of the cabin are aligned with the positioning pins on the positioning ring. The cabin is inserted along the first guide block and the second guide block and guided by the pin shaft. The clamping ring is placed on... On the cabin body, a hook-shaped clamping mechanism is used to symmetrically and evenly clamp the clamping ring; after the auxiliary support wrench is released and the soft claw fits into the cabin body, the auxiliary support is locked; the robot takes the tooling with the installed cabin body from the installation station through the coupling and transports it to the machine tool door; the barcode scanner outside the machine tool door scans the identification chip on the quick-change substrate; after the machine tool door opens automatically, the robot connects the tooling to the zero-point quick-change base on the machine tool worktable through the pull stud; after the robot releases the coupling, it leaves the machine tool and moves to the designated position; the machining program is executed to perform cabin body machining.

[0068] This invention can realize the functions of transfer, clamping and pressing of various specifications of cabins on the production line, and has the advantages of strong product versatility, compact structure and convenient operation.

[0069] This embodiment has the advantages of simple operation, compatibility with various cabin types, and reduced labor intensity.

[0070] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A flexible clamping device for internal cavity processing in a cabin production line, characterized in that, include: Quick-change module (1), positioning module (2), axial clamping module (3), auxiliary support module (4), ring frame (5), first guide block (6), and second guide block (7); The positioning module (2) and the ring frame (5) are both fixedly installed on the quick-change module (1). The first guide block (6) is installed on the upper part of the inner side of the ring frame (5), and the second guide block (7) is installed on the positioning surface of the positioning module (2). The cabin (8) is loaded through the first guide block (6) and the second guide block (7) and positioned by the positioning module (2). An auxiliary support module (4) is provided in the middle of the inner side of the ring frame (5) to achieve radial support for the cabin (8). The axial pressing module (3) is installed on the top end face of the ring frame (5) to achieve axial pressing of the cabin (8). The quick-change module (1) includes: a coupling (9), a quick-change base plate (10), a pull stud (11), an identification chip (12), and a quick-change base (13). The coupling (9) is mounted on the side of the quick-change base plate (10) by side and bottom screws, and is used to connect with the robot to realize the movement of the flexible clamping device for internal cavity processing. The quick-change base (13) is clamped on the lathe. The pull stud (11) is connected to the quick-change base plate (10) by screws to realize the connection between the quick-change base plate (10) and the quick-change base (13). The identification chip (12) is fixed to the side of the quick-change base plate (10) by screws, and is used for product number identification in the production line and feedback control of machine tool door opening and closing after identification. The positioning module (2) includes: a positioning ring (14) and a quick-change positioning pin assembly (15); The quick-change positioning pin assembly (15) is positioned by a shaft hole and fixed to the positioning ring (14) by screws, and can be quickly replaced according to the needs of different cabins; the positioning ring (14) is fixed to the quick-change base plate (10); The upper surface of the positioning ring (14) is engraved with lines to indicate different cabin installation angles; the positioning ring (14) is designed with a circumferential hollow structure to facilitate the smooth discharge of chips and prevent chip blockage.

2. The flexible clamping device for internal cavity processing in a cabin production line according to claim 1, characterized in that: The quick-change positioning pin assembly (15) includes: a pin seat (16), a positioning pin (17), a spring (18), a screw plug (19), and a set screw (20). The screw plug (19) is connected to the bottom thread of the pin seat (16) by a thread, the positioning pin (17) is engaged with the pin hole of the pin seat (16), and a spring (18) is provided between the positioning pin (17) and the screw plug (19). The spring force is adjusted by the screw plug (19). The positioning pin (17) has a guide groove, which extends and retracts along the axis and is fixed by a set screw (20). This allows for quick switching according to the needs of different compartments. When producing compartment A, the positioning pins corresponding to the other compartments are retracted into the pin seat and fixed with a set screw (20). Then, the positioning pin (17) corresponding to compartment A is extended and fixed with a set screw (20).

3. The flexible clamping device for internal cavity processing in a cabin production line according to claim 1, characterized in that: The axial clamping module (3) includes: a hook-shaped clamping mechanism (21), a height adjustment rod (22), and a clamping ring (23); The hook-shaped clamping mechanism (21) presses on the clamping ring (23) through the pressure plate, ensuring that the clamping force is evenly applied to the cabin through the clamping ring (23); the pressure plate of the hook-shaped clamping mechanism (21) can rotate 360° for easy clamping; the height adjustment rod (22) is connected to the hook-shaped clamping mechanism (21), and the pressure plate of the hook-shaped clamping mechanism can extend and retract axially. By using height adjustment rods (22) of different heights and cooperating with the axial extension and retraction stroke of the hook-shaped clamping mechanism (21), it can adapt to the clamping of cabins of different heights.

4. The flexible clamping device for internal cavity processing in a cabin production line according to claim 1, characterized in that: The auxiliary support module (4) includes: a handle (24), an auxiliary support mechanism (25), a soft claw (26), a rubber pad (27), and a handle (28). The soft claw (26) is installed on the output shaft of the auxiliary support mechanism (25), and a rubber pad (27) is fixed on the soft claw to increase the contact area with the side wall of the cabin without damaging the cabin. The handle (24) is connected to the auxiliary support mechanism (25) to facilitate the retraction of the output shaft. A high-elasticity spring is installed inside the auxiliary support mechanism (25) to pop out the output shaft. The auxiliary support mechanism (25) has a cam mechanism inside, and the output shaft is locked by the handle (28).

5. A flexible clamping device for internal cavity processing in a cabin production line according to claim 1, characterized in that: The ring frame (5) is an integral ring frame structure, and the material is 7075 aluminum alloy.

6. The flexible clamping device for internal cavity processing in a cabin production line according to claim 1, characterized in that: The first guide block (6) and the second guide block (7) are made of nylon rubber and are used for coarse positioning of the cabin to achieve rapid installation guidance of the cabin. The guide diameter is the cabin diameter D + (1~2) mm.

7. A clamping method for machining the inner cavity of a cabin production line based on the flexible clamping device for inner cavity machining according to any one of claims 1-6, characterized in that, Includes the following steps: S1. The robot transports the flexible clamping device for internal cavity processing to the installation station via a coupling and then leaves; S2. The cabin is transferred to the installation station through the previous process in the logistics system; S3. Extend the positioning pin on the corresponding positioning module of the cabin and retract the remaining positioning pins into the hole; S4. Retract and lock the auxiliary support module; S5. Turn the pressure plate of the hook-shaped clamping mechanism to the outside; S6. Align the hull positioning hole with the positioning pin on the positioning ring of the positioning module; S7. Insert the cabin along the first guide block and the second guide block and guide it into the pin; S8. Place the clamping ring on the cabin; S9. The pressure plate of the hook-shaped clamping mechanism symmetrically and evenly clamps the clamping ring to achieve axial clamping of the cabin. S10. Loosen the handle of the auxiliary support module, allow the soft claw to fit against the cabin, and then lock the auxiliary support module with the handle to achieve radial support of the cabin. S11. The robot uses a coupling to remove the tooling with the installed cabin from the installation station and transport it to the machine tool door. S12. The barcode scanner outside the machine tool door scans the identification chip on the quick-change substrate; S13. After the machine tool door opens automatically, the robot connects the tooling to the zero-point quick-change base on the machine tool worktable via a pull stud. S14. After the robot releases the coupling, it leaves the machine tool and moves to the designated position. S15. Execute the processing procedure and perform cabin processing.

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