A different cross section longer beam drilling and milling inspection device

Abstract

The present application belongs to the field of aviation manufacturing technology, and relates to a drilling and milling detection device for long string with different cross sections, comprising a fixed chuck, a linear slide rail and a pressing plate. The fixed chuck is an L-shaped steel material, and the upper surface of the fixed chuck is a first positioning profile matched with the A surface of the long string. The vertical surface of the L-shaped transition surface of the fixed chuck is a second positioning surface matched with the B surface of the long string. Multiple pressing plates are uniformly arranged along the length direction of the first positioning profile for pressing the upper surface of the long string. Multiple linear slide rails are arranged on the horizontal surface of the L-shaped transition surface of the fixed chuck, and the setting direction of the linear slide rails is the length direction. A clamp sliding module is arranged on the linear slide rail for clamping the long string. Multiple pneumatic pressing devices are arranged on the side wall of the fixed chuck for pressing the clamp sliding module.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of aviation manufacturing technology, and relates to a drilling and milling inspection device for long string of different cross sections. BACKGROUND

[0002] The long string structure is one of important components of the aircraft fuselage, and is the main bearing and transmission structure of the aircraft fuselage axial force and bending moment. The good design efficiency and design quality is one of the bases for ensuring the overall efficiency and performance of the aircraft design and manufacturing. The long string parts can be divided into C type, T type, L type and E type according to the shape. Due to the precision of the aviation part structure design, the edge size of the long string must be accurately controlled to meet the use requirements, and the milling method is usually used for edge processing.

[0003] Usually, in actual part production, due to the need of structure design, the same part may contain long strings with different structures and lengths, and when the skin of the part is sunken, the corresponding lower surface of the long string is also sunken, which causes the complexity and diversity of the long string structure. In order to meet the requirements of milling processing, multiple milling toolings need to be designed and manufactured, which prolongs the production cycle and increases the production cost, and these toolings are usually only for one kind of long string structure, which has poor practicability. The current process method has the following defects:

[0004] 1. Many special fixtures, narrow use range of the fixture, increase the production cost, and have poor practicability.

[0005] 2. The fixture has low automation degree, and the clamping of the fixture still adopts manual method, which is time-consuming and laborious.

[0006] 3. Milling, drilling and inspection are completed on different toolings, workers need to clamp multiple times, which cannot guarantee the consistency of the reference, resulting in low processing precision. SUMMARY

[0007] The application aims to provide a new process equipment structure. The tooling can meet the milling requirements of long strings with different shapes, different lengths and different widths such as C, L, Z and T, greatly saving the production cost. The tooling integrates milling, drilling and inspection, the product is clamped on the tooling at one time, reduces the clamping error, guarantees the uniqueness of the product and the tooling design reference, greatly improves the precision requirements of the long string part milling, adopts automatic pressing, greatly improves the production efficiency and liberates manual labor.

[0008] TECHNICAL SCHEME

[0009] A drilling and milling inspection device for long string of different cross sections, comprising: a fixed chuck, a linear slide rail and a pressing plate.

[0010] The fixed chuck is L-shaped steel material, the upper surface of the fixed chuck is a first positioning profile, which matches the surface A of the stringer; the vertical surface of the L-shaped transition surface of the fixed chuck is a second positioning surface, which matches the surface B of the stringer;

[0011] The first positioning profile is uniformly provided with a plurality of pressing plates in the length direction, for pressing the upper surface of the stringer;

[0012] The horizontal surface of the L-shaped transition surface of the fixed chuck is provided with a plurality of linear sliding rails, and the setting direction of the linear sliding rails is the length direction; the linear sliding rails are provided with a clamp sliding module, for clamping the stringer;

[0013] The side wall of the fixed chuck is provided with a plurality of pneumatic pressing devices, for pushing the clamp sliding module to move forward and backward.

[0014] Further, the first positioning profile is provided with a rectangular notch at the front end, and a rectangular positioning block is installed in the rectangular notch, for positioning the end of the stringer.

[0015] Further, the clamp sliding module comprises a sliding chuck, a sliding block, a pressing block and a bolt;

[0016] The lower surface of the sliding chuck is provided with two square notches for accommodating the sliding block, and the sliding block slides on the linear sliding rail;

[0017] One side surface of the sliding chuck is a third positioning profile, which matches the surface C of the stringer, and the other side surface is provided with a plurality of T-shaped notches,

[0018] The T-shaped notches are provided with a bolt connecting pneumatic pressing device.

[0019] Further, the upper surface of the sliding chuck is provided with a rectangular notch at the front end, and a rectangular positioning block is installed in the rectangular notch, for positioning the end of the stringer.

[0020] Further, the second positioning profile of the fixed chuck is provided with a first U-shaped groove, and the first U-shaped groove is arranged along the length direction of the fixed chuck.

[0021] Further, the third positioning profile of the sliding chuck is provided with a second U-shaped groove, and the second U-shaped groove is equal in size and symmetrically arranged with the first U-shaped groove.

[0022] Further, the pneumatic pressing device comprises a pneumatic cylinder and a pneumatic cylinder gasket;

[0023] The pneumatic cylinder gasket is connected with the side wall of the fixed chuck by a bolt;

[0024] The pneumatic cylinder is fixed on the pneumatic cylinder gasket, and the pneumatic cylinder is connected with the sliding chuck by a bolt, and moves through a piston to push the bolt to drive the sliding chuck to move forward and backward.

[0025] Further, the gasket plate is provided with a threaded hole, and a compression screw is screwed in the threaded hole, and the compression screw is provided with a handle at the rear end;

[0026] The T-shaped groove of the sliding chuck is provided with a pressing block, and the self-locking is realized by compressing the pressing block through the compression screw.

[0027] Further, the second positioning profile of the fixed chuck is provided with a plurality of profile grooves, and the third positioning profile of the sliding chuck is provided with a plurality of profile grooves, and the longeron is avoided.

[0028] Further, the first, second and third positioning profiles are plane, curved surface and double curved surface, and are matched with the profile of the longeron.

[0029] Beneficial effects: the application provides a flexible tool for (C, L, Z, T) type longeron milling and drilling detection, and has the following beneficial effects: (1) the modular structure is adopted, the same modules with a length of 1.5 to 2 meters are connected through pin shafts, so that the length of the tool can reach 30 meters, and each module is provided with an L-shaped notch. Therefore, the tool can meet the milling and cutting requirements of longerons with different shapes, different lengths and different widths, and greatly saves the production cost. (2) the pneumatic compression and sliding type fast compression device is adopted, mechanical and electrical integration is realized, the production efficiency is greatly improved, and manual labor is liberated. (3) milling, drilling and detection are integrated, the clamping error is reduced, the uniqueness of the reference is ensured, and the machining precision of the longeron part is improved to within 0.05 mm. (4) the mechanical self-locking function is designed skillfully, which can avoid scratching the longeron profile and achieve the purpose of protecting the safety of workers. (5) the complex double curved longeron can be milled, drilled and detected, so that the precision of the double curved longeron with a length of several meters can be improved to within 0.2 mm. BRIEF DESCRIPTION OF DRAWINGS

[0030] The application includes five drawings, and the drawings and the brief description of drawings are as follows:

[0031] Figure 1 It is a front view of longeron profiles with different shapes of aircraft;

[0032] Figure 2 It is a front view of a (C, L, Z, T) type plane longeron profile milling and drilling detection flexible tool;

[0033] Figure 3 It is a front view of a clamp fixed module system;

[0034] Figure 4 It is a front view of a clamp sliding module system;

[0035] Figure 5 It is a front view of a clamp pneumatic compression locking system;

[0036] Figure 6Clamping process schematic diagram for long string section;

[0037] Figure 7 Main view of Z-shaped double-curved long string section;

[0038] Figure 8 Main view of milling and drilling flexible tooling for Z-shaped double-curved long string section;

[0039] Wherein: 01. fixed chuck, 02. rectangular positioning block, 03. linear slide rail, 04. pressing plate, 05. positioning profile 1, 06. positioning profile 2, 07. screw, 08. sliding chuck, 09. rectangular positioning block, 10. square slide block, 11. pressing block, 12 bolt, 13. U-shaped notch 1, 14. U-shaped notch 2, 15. air cylinder, 16. air cylinder backing plate, 17. screw, 18. curved fixed chuck, 19. curved sliding chuck. DETAILED DESCRIPTION

[0040] In order to solve the above technical problems, the present application is realized by the following technical scheme: as shown in the figure, a flexible tooling for (C, L, Z, T) type long string milling and drilling is provided, which is composed of a plurality of modules with a length of 1.5 to 2 meters, each independent module is composed of a chuck fixing system, a chuck sliding module system, a pneumatic pressing and mechanical self-locking system.

[0041] The chuck fixing module system is composed of a fixed chuck 01, a rectangular positioning block 02, a linear slide rail 03 and a pressing plate 04. The fixed chuck 01 is an L-shaped steel structure. The upper surface and the side surface of the fixed chuck 01 are provided with positioning profiles 05 and 06 matched with the A surface and the B surface of the long string part. A rectangular notch is provided at the front end of the positioning profile 05, and a rectangular positioning block 02 is arranged in the rectangular notch for positioning the end of the long string section. A row of threaded holes is arranged in the X direction of the positioning profile 05 for mounting the evenly arranged pressing plates 04, so as to press the upper surface of the long string section. A plurality of threaded holes are arranged on the lower surface of the fixed chuck 01 for connecting the linear slide rail 03. A plurality of threaded holes are also arranged on the lower side of the fixed chuck 01, and a screw 07 is arranged in the threaded holes for connecting the pneumatic pressing device.

[0042] The chuck sliding module system is composed of a sliding chuck 08, a rectangular positioning block 09, a square slide block 10, a pressing block 11 and a bolt 12. The sliding chuck 08 is a rectangular steel structure. The upper surface of the sliding chuck 08 is provided with a rectangular notch, and a rectangular positioning block 09 is arranged in the rectangular notch for positioning the end of the long string part. Two square notches are arranged on the bottom of the sliding chuck 08, and a square slide block 10 is arranged in the square notches, and the square slide block 10 and the sliding chuck 09 are connected together by a bolt to form a sliding part. A T-shaped notch is arranged on one side of the sliding chuck 08, and a pressing block 11 and a bolt 12 are arranged in the T-shaped notch. The pressing block 11 is connected with the self-locking system, and the bolt 12 is connected with the pneumatic pressing system.

[0043] At the same time, U-shaped notches 13 and 14 are arranged on the side of the fixed chuck 01 and the sliding chuck 08, which are combined into a mouth-shaped gap, and the long stringer profile non-processing part can be avoided.

[0044] The pneumatic pressing system is composed of the air cylinder 15 and the air cylinder pad 16, a plurality of bolt holes are arranged on the air cylinder pad, and the air cylinder pad is connected to the fixed chuck 01 through the screw 07. The bolt 12 connects the air cylinder and the sliding chuck together. When the air cylinder is filled with air, the pneumatic pressure is provided through the air source, the bolt 12 is driven to move, and the sliding chuck 10 is driven to move forward and backward on the linear slide rail 3.

[0045] The mechanical self-locking system is composed of the pressing screw 17, and the self-locking function of the clamp is realized. When the sliding chuck moves to the appropriate position, the pressing screw 17 acts on the pressing block 11, so that the tool is in a tightened state, which can not only avoid scratching of the long stringer profile during the movement of the air cylinder, but also achieve the purpose of protecting the safety of workers.

[0046] The flexible tool and method for milling and drilling detection of (C, L, Z, T) type long stringers are described in detail in combination with the drawings. First, the end face "A" of the aircraft long stringer profile is placed on the positioning surface 05 of the fixed chuck 01, and at the same time, the side face "B" of the long stringer part is ensured to be attached to the positioning surface 06 of the fixed chuck 01. The sliding chuck 08 of the long stringer part is driven by the pneumatic pressing device controlled by the pneumatic control system to move forward and backward, and the square block 10 on the sliding chuck 08 slides on the linear slide rail 03. When the side of the sliding chuck 08 contacts the "C" face of the long stringer profile, the locking tool is pressed and locked. The specific implementation is as follows:

[0047] (1) The end face "A" of the aircraft long stringer part is placed on the positioning surface 05 of the fixed chuck 01, and at the same time, the side face "B" of the aircraft long stringer part is ensured to be attached to the positioning surface 06 of the fixed chuck 01;

[0048] (2) The sliding chuck 08 is placed on the upper part of the fixed chuck 01, and the pneumatic control system starts to fill air. When the air cylinder is filled with air, the pneumatic pressure is provided through the air source, the bolt 12 is driven to move, and the sliding chuck 08 is driven to move on the linear slide rail 03 until the side of the sliding chuck is attached to the "C" face of the long stringer profile;

[0049] (3) The pneumatic control system sets the clamping force, so that the sliding chuck 08 is completely attached to the side "C" of the long stringer part, and then the pressing plate 04 is pressed on the surface of the long stringer part one by one, so that the part is completely fixed in the tool.

[0050] (4) The screw 17 is tightened to realize the locking of the tool and the closing of the air path. The tool is placed on the machine tool to mill the edge of the aircraft long stringer part.

[0051] (4) On the five-axis head machine tool, the micrometer is used to complete the edge detection of the part.

[0052] (5) After the completion of the part edge detection, through the pneumatic control system control unloading clamping force, make the slide chuck 08 to the long string section of the opposite direction movement, so that the distance between them can take out the long string section when closed air path, unload the press plate, take out the long string section can.

[0053] In the actual production of parts, due to the need of structural design, the same part may contain different structures, different length of the long string, and when the skin of the part exists subsidence, the corresponding long string lower surface also has the corresponding subsidence, so there will be single curvature and double curvature of the long string section, for this complex long string section this tooling is also applicable.

[0054] For complex single curvature and double curvature of the long string, only need to replace the fixed chuck 01 and slide chuck 08 in the module for curved fixed chuck 18 and curved slide chuck 19. The upper surface of the curved fixed chuck 18 is the curved surface which matches the long string section of the long string section of the curved surface D, and its side is the curved surface which matches the long string section E surface. The side of the curved slide chuck 19 is the curved surface which matches the long string section F surface. The specific implementation is the same as the flat long string section.

Claims

1. A different cross section stringer drilling and milling inspection apparatus, characterized by, The utility model relates to a kind of aircraft stringer fixture, including: Fixed chuck, linear slide rail, pressing plate; Fixed chuck is L-shaped steel material, the upper surface of fixed chuck is first positioning profile, and is matched with stringer A surface;The vertical surface of the L-shaped transition surface of fixed chuck is second positioning surface, and is matched with stringer B surface; First positioning profile is uniformly provided with multiple pressing plates along length direction, for pressing stringer upper surface; Multiple linear slide rails are arranged on the horizontal surface of the L-shaped transition surface of fixed chuck, and linear slide rail setting direction is length direction;Linear slide rail is equipped with clamp sliding module, for clamping stringer; Multiple pneumatic pressing devices are arranged on the side wall of fixed chuck, for pressing clamp sliding module; First positioning profile front end is equipped with rectangular notch, rectangular positioning block is installed in rectangular notch for positioning stringer end; Clamp sliding module includes: sliding chuck, sliding block, pressing block and bolt; Two square notches are arranged on the lower surface of sliding chuck for accommodating sliding block, and sliding block is slid on linear slide rail; One side of sliding chuck is third positioning profile, and is matched with stringer C surface, and another side is equipped with multiple T-shaped notches, T-shaped notch is equipped with bolt connection pneumatic pressing device; The upper surface of sliding chuck is equipped with rectangular notch in front end, rectangular positioning block is installed in rectangular notch for positioning stringer end; Second positioning profile of fixed chuck is equipped with first U-shaped groove, and first U-shaped groove is arranged along the length direction of fixed chuck; Third positioning profile of sliding chuck is equipped with second U-shaped groove, and second U-shaped groove is equal in size and symmetrically arranged with first U-shaped groove; Pneumatic pressing device includes: air cylinder, air cylinder gasket; Air cylinder gasket is connected with the side wall of fixed chuck by bolt; Air cylinder is fixed on air cylinder gasket, and the piston of air cylinder is connected with sliding chuck by bolt; Use as follows: (1) the end surface of aircraft stringer part "A" is placed on the positioning profile of fixed chuck, and aircraft stringer part side surface "B" is guaranteed to be attached with the positioning profile of fixed chuck simultaneously; (2) sliding chuck is placed on the upper part of fixed chuck, and air intake is started by pneumatic control system, and pneumatic pressure is provided by gas source when air cylinder air intake, so as to drive sliding chuck to move on linear slide rail by bolt movement, until sliding chuck side and stringer profile "C" surface are attached; (3) the clamping force is set by pneumatic control system, so that sliding chuck and stringer part side surface "C" are completely attached, and pressing plate is pressed on stringer part surface one by one, so that the part is completely fixed in tooling; (4) tighten screw, realize tooling locking and close gas circuit, and tooling is placed on machine tool to mill aircraft stringer part edge; (4) on five-axis head machine tool, use micrometer, complete part edge detection; (5) after completing part edge detection, unload clamping force by the control of pneumatic control system, so that sliding chuck moves to the opposite direction of stringer profile, so that the distance between them can take out stringer profile, close gas circuit, unload pressing plate, and take out stringer profile.

2. The apparatus of claim 1, wherein, Threaded hole is further arranged on the air cylinder gasket, and pressing screw is screwed in threaded hole, and handle is arranged on the rear end of pressing screw; Pressing block is arranged in the T-shaped groove of sliding chuck, and self-locking is realized by pressing block by pressing screw.

3. The apparatus of claim 2, wherein, The second positioning profile of the fixed chuck is provided with a plurality of profile grooves, and the third positioning profile of the sliding chuck is provided with a plurality of profile grooves, and the longerons are avoided.

4. The apparatus of claim 3, wherein, The first, second and third positioning profiles are plane, curved surface and double curved surface, and are matched with the profiles of the longerons.

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