High-precision assembling device and method for L-shaped structural part

Abstract

The invention discloses a high-precision assembling device for an L-shaped structural part. The high-precision assembling device comprises a base plate, a drill jig base, a positioning column and a backup plate, wherein the drill jig base, the positioning column and the backup plate are arranged on the base plate; wherein the positioning column is arranged between the drill jig base and the backup plate, the drill jig base is provided with a drill jig adapter seat with an adjustable position, the drill jig adapter seat is provided with a drill jig support arm with an adjustable position, the end part of the drill jig support arm is provided with a drill bushing, and the drill bushing is detachably provided with a positioning pin; the L-shaped structural part is assembled on the upper portion of the positioning column in the mode that one mounting face faces upwards, positioning is conducted through the backup plate in the width direction, after end face positioning is conducted through the end face positioner, clamping and fixing are conducted through the pressing plate installed on the backup plate, then positioning is conducted on a to-be-manufactured mounting hole through the positioning pin, and hole manufacturing is conducted through the drill bushing. The device has the characteristics of high assembly precision and high replacement efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aircraft manufacturing, in particular to a high-precision assembly device and method for L-shaped structural parts, which are used to ensure the precision and coordination of the two mounting surfaces of the L-shaped structural parts. BACKGROUND

[0002] To ensure the flight safety and quality of the aircraft, it is necessary to periodically replace the installed L-shaped load-bearing components. When replacing the L-shaped structural parts, the bolt mounting holes on the aircraft body connected to the two mounting surfaces of the L-shaped structural parts have been manufactured, and the precision of the mounting holes on the structural parts is required to be high, and the coordination of the multiple bolt holes on the two mounting surfaces is not easy to ensure. If there is a deviation in one or several bolt holes, it will lead to the fact that the bolt holes cannot be coordinated to install the bolts when the new parts are installed, which will not meet the requirements. How to reverse the high-precision bolt holes on the two mounting surfaces of the aircraft body to the replacement structural parts to ensure their stable coordination is an important problem. SUMMARY The purpose of the present application is to provide a high-precision assembly device and method for L-shaped structural parts, which are used to reverse the bolt holes on the two mounting surfaces of the aircraft body to the replacement L-shaped structural parts, so as to ensure the coordination of the bolt holes on the two mounting surfaces of the replacement L-shaped structural parts and the mounting holes connected on the aircraft body.

[0003] In order to achieve the above-mentioned task, the present application adopts the following technical solutions: The high-precision assembly device for L-shaped structural parts comprises a base plate, a drill jig base, a positioning column and a back plate arranged on the base plate; wherein the positioning column is arranged between the drill jig base and the back plate, the drill jig base is provided with a position-adjustable drill jig adapter, the drill jig adapter is provided with a position-adjustable drill jig arm, the end of the drill jig arm is provided with a drill sleeve, and the drill sleeve is detachably provided with a positioning pin; the L-shaped structural part is assembled on the upper part of the positioning column in a manner that one mounting surface faces upward, and after being positioned in the width direction by the back plate and positioned in the end face by an end face positioner, it is clamped and fixed by a pressing plate installed on the back plate, and then the positioning of the to-be-prepared mounting hole is performed by the positioning pin and the hole drilling is performed by the drill sleeve.

[0004] Further, the cross section of the drill jig base is in a C-shaped structure, which is composed of a connecting plate arranged vertically to the base plate and a top plate and a bottom plate fixed to the upper and lower ends of the connecting plate; a sliding groove is formed on the top plate in the length direction, and the drill jig adapter is assembled on the sliding groove.

[0005] Further, the drill jig adapter is in L-shaped structure; the shorter side of the drill jig adapter is in plane fit with the drill jig base, and the longer side is connected with the drill jig arm; the fixed bolt one is assembled in the sliding groove on the drill jig base, and passes through the first adjusting groove on the shorter side of the drill jig adapter, and is connected through the fixed nut one.

[0006] Further, the longer side of the drill jig adapter is perpendicular to the surface of the base plate, and the second adjusting groove is longitudinally formed on the longer side, and the fixed bolt two is assembled in the second adjusting groove; the third adjusting groove is formed on the drill jig arm, and the connecting ring is arranged at one end of the drill jig arm for mounting the drill sleeve; the fixed bolt two passes through the third adjusting groove and is connected through the fixed nut two.

[0007] Further, the connecting ring of the drill jig arm is sleeved outside the drill sleeve; the annular clamping groove is formed on the inner wall of the connecting ring, and the stepped groove matched with the annular clamping groove is arranged on the outer wall of the drill sleeve; the drill sleeve is assembled from top to bottom on the connecting ring, so that the stepped groove is supported on the annular clamping groove, and the axial limiting of the drill sleeve is realized.

[0008] Further, the drill sleeve has a drill hole, and the positioning pin passes through the drill hole; the positioning pin and the drill sleeve are used for positioning the mounting hole on the L-shaped structure to be replaced, and the drill sleeve is also used for cooperating with the reamer to drill the mounting hole on the L-shaped structure to be replaced.

[0009] Further, the upper end surface of the positioning column is used for contacting the L-shaped structure, and limiting the displacement of the L-shaped structure in the up-down direction; the positioning column is provided in pair, and the connecting line between the axes of the two positioning columns is parallel to the direction of the connecting plate of the drill jig base.

[0010] Further, the back plate is in L-shaped structure, one surface of the back plate is fixed on the base plate, and the other surface is the first positioning surface; the first positioning surface is parallel to the connecting plate of the drill jig base, and is perpendicular to the base plate, and is used for cooperating with the mounting surface of the L-shaped structure to limit the displacement of the L-shaped structure in the width direction.

[0011] Further, the threaded hole is formed on the first positioning surface of the back plate, and the clamp bolt is assembled in the threaded hole; the clamp plate is arranged on the inner side of the back plate, the shaft hole is formed on the clamp plate, the clamp bolt passes through the shaft hole and is connected on the first positioning surface of the back plate; the clamp nut is assembled on the clamp bolt.

[0012] Further, the clamp bolt is located below the L-shaped structure, the clamp plate is rotated and located on the inner side of the L-shaped structure, the clamp nut is locked after the L-shaped structure is adjusted in place, so that the clamp plate is fixed to clamp the part.

[0013] Further, the end face positioner is an L-shaped structure, one face of the end face positioner is fixed on the base plate, and the other face is a second positioning face, a threaded hole is formed on the second positioning face and an end face bolt is assembled; the end of the end face bolt is used to tightly press against the end of the L-shaped structure, and the length direction of the L-shaped structure is limited.

[0014] The high-precision assembly method of the L-shaped structure, comprising: Step 1, the L-shaped structure one to be replaced on the machine body is removed, one mounting face A of the L-shaped structure one is supported on the positioning column, and the other mounting face B is attached to the first positioning face of the back plate; the end face bolt is screwed, the extension amount of the end face bolt relative to the end face positioner is adjusted, and the side end face of the L-shaped structure one is pressed; the position of the pressing plate is adjusted, so that the pressing plate is located on the inner side of the mounting face B, and then the pressing plate nut is locked to clamp the mounting face B by the two sets of pressing plates; Step 2, the drill sleeve is assembled into the connecting ring at the end of the drill jig arm, and then the positioning pin is inserted into the drill sleeve; then the drill jig adapter is moved on the sliding groove of the drill jig base to adjust the position of the drill jig arm, so that the positioning pin is inserted into the first mounting hole of the mounting face A of the L-shaped structure one; then the fixing nut two is tightened to fix the position of the drill jig arm on the drill jig adapter; the fixing nut one is tightened to fix the drill jig adapter and the drill jig base; Step 3, the positioning pin is removed, the pressing plate bolt is loosened, and the L-shaped structure one is removed; then a new L-shaped structure is installed by the same installation method as the L-shaped structure one in the step; Step 4, a first mounting hole is prepared on the L-shaped structure two through the drill hole on the drill sleeve using a reamer; after the hole is prepared, the new L-shaped structure two is removed; the L-shaped structure one is reinstalled according to the method of the step, and the position of the positioning pin is re-adjusted according to the method of the step, so that the positioning pin is inserted into the next mounting hole to fix the drill jig arm and the drill jig adapter; the positioning pin is removed, and then the L-shaped structure two is removed; after the L-shaped structure one is replaced, the next mounting hole is prepared through the drill sleeve; the step is repeated to complete the preparation of all mounting holes on the mounting face A of the L-shaped structure two; Step 5, the L-shaped structure A with the mounting face A having prepared mounting holes is fixed on the installation position of the aircraft body using the installation bolt, and the drill sleeves are sequentially installed in the bolt holes corresponding to the body on the other mounting face B; the initial hole of the mounting hole is prepared on the mounting face B using a reamer through the drill sleeve; the L-shaped structure two with the initial hole prepared is removed. Step 6, install the L-shaped structural member two on the assembly device with the mounting surface B facing upward, then adjust the position of the drill jig support arm by the method of step, so that after the positioning pin is inserted into the initial hole, the fixed drill jig support arm and the drill jig adapter are fixed, and then the initial hole is expanded to the size of the mounting hole by using the reamer through the drill hole on the adapter; after all the initial holes are expanded in the same way, remove the L-shaped structural member two, and all hole preparation is completed, which can be installed and used at this time.

[0015] Compared with the prior art, the application has the following technical characteristics: 1. The application provides a high-precision assembly device for an L-shaped structural member, which can adjust the posture of a drill jig in five degrees of freedom through adjustment and locking of components, so as to reach a coordinated state with a part hole and find a bolt hole position, thereby playing a role in positioning the bolt hole on a new part; the device has the characteristics of high assembly precision and high replacement efficiency.

[0016] 2. The application also provides a replacement hole drilling method for an L-shaped structural member of an aircraft structure, and the method is characterized in that the method combines an adjustable drill jig and on-machine hole taking, which can guarantee the hole drilling precision of the bolt hole of the replacement part and the coordination of the bolt holes on the two mounting surfaces of the L-shaped structural member with the already drilled holes on the aircraft. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the first perspective view of the axis of the device of the application; Figure 2 It is the second perspective view of the axis of the device of the application; Figure 3 It is the third perspective view of the axis of the device of the application; Figure 4 It is the fourth perspective view of the axis of the device of the application.

[0018] Explanation of reference numerals in the drawing: 1 base plate, 2 drill jig base, 3 fastening screw one, 4 drill jig adapter, 5 fixed washer one, 6 fixed nut one, 7 fixed bolt one, 8 fixed washer two, 9 fixed nut two, 10 fixed bolt two, 11 drill jig support arm, 12 drill sleeve, 13 positioning pin, 14 positioning column, 15 fastening screw four, 16 end face positioner, 17 fastening screw three, 18 end face bolt, 19 back plate, 20 pressure plate bolt, 21 fastening screw two, 22 pressure plate, 23 pressure plate washer, 24 pressure plate nut. DETAILED DESCRIPTION

[0019] The application provides a high-precision assembly device for L-shaped structural members, which realizes replacement of L-shaped structural members on an aircraft body to ensure coordination between newly manufactured mounting holes on two mounting surfaces of the new L-shaped structural members and original holes on the aircraft; the assembly device comprises a base plate 1, a drill jig base 2, a positioning column 14 and a back plate 19 arranged on the base plate 1; the positioning column 14 is arranged between the drill jig base 2 and the back plate 19, the drill jig base 2 is provided with a position-adjustable drill jig adapter 4, the drill jig adapter 4 is provided with a position-adjustable drill jig arm 11, the end of the drill jig arm 11 is provided with a drill sleeve 12, and the drill sleeve 12 is detachably provided with a positioning pin 13; the L-shaped structural member is assembled on the upper portion of the positioning column 14 in a manner that one mounting surface faces upward, and is positioned in the width direction by the back plate 19 and positioned in the end surface by an end surface positioner 16, and then is clamped and fixed by a pressing plate 22 mounted on the back plate 19, and then is positioned for the to-be-manufactured mounting hole by the positioning pin 13 and is drilled by the drill sleeve 12.

[0020] Referring to Figures 1 to 4 , in one embodiment of the application, the device comprises a base plate 1, a drill jig base 2, a fastening screw 1 3, a drill jig adapter 4, a fixed washer 2 8, a fixed nut 2 9, a fixed bolt 2 10, a drill jig arm 1 1, a fixed washer 1 5, a fixed nut 1 6, a fixed bolt 1 7, a drill sleeve 1 2, a positioning pin 1 3, a positioning column 1 4, a fastening screw 4 15, an end surface positioner 1 6, a fastening screw 3 17, an end surface bolt 1 8, a back plate 1 9, a pressing plate bolt 2 0, a fastening screw 2 21, a pressing plate 2 2, a pressing plate washer 2 3, and a pressing plate nut 2 4. The base plate 1 serves as the basic structure of the assembly device and is in the form of a flat plate and is used for fixing other components; the components fixed on the base plate 1 mainly include one drill jig base 2, two positioning columns 1 4, two back plates 1 9 and one end surface positioner 1 6.

[0021] The drill jig base 2 serves to support and adjust the drill jig adapter 4; the drill jig base 2 is in the form of a C-shaped structure and is composed of a connecting plate arranged perpendicularly to the base plate 1 and a top plate and a bottom plate fixed on the upper and lower ends of the connecting plate; the bottom plate is fixed on the base plate 1 by the fastening screw 1 3, and the top plate is parallel to the surface of the base plate 1; as shown in Figure 1 , a sliding groove is formed in the length direction of the top plate, and the drill jig adapter 4 is assembled on the sliding groove; the position of the drill jig adapter 4 relative to the L-shaped structural member can be adjusted through the sliding groove.

[0022] The drill jig adapter 4 is an L-shaped connector between the drill jig support arm 11 and the drill jig base 2. The shorter side of the adapter 4 has a planar fit with the drill jig base 2, while the longer side connects to the drill jig support arm 11. Adjustment grooves are provided on both sides of the adapter 4 to adjust the drill jig angle during use. A fixing bolt 7 is installed in a groove on the top plate of the drill jig base 2. The fixing bolt 7 passes through the first adjustment groove on the shorter side of the adapter 4 and is connected by a fixing washer 5 and a fixing nut 6. This allows the drill jig adapter 4 to be mounted on the drill jig base 2 and slide along the groove on the drill jig base 2. After adjusting the posture of the drill jig support arm 11, tighten the fixing nut 6 to fix the drill jig adapter 4 on the drill jig base 2; there are two fixing shims 5, which are used to fix the bolt head of the bolt 7 and the contact surface between the nut 6 and the drill jig adapter 4 and the drill jig base 2, respectively, to protect the tooling structure during tightening and avoid crushing damage.

[0023] The drill jig adapter 4 has a longer side perpendicular to the surface of the base plate 1. A second adjustment groove is longitudinally formed on this longer side, and a fixing bolt 10 is fitted into the second adjustment groove. A third adjustment groove is formed on the drill jig support arm 11, and a connecting ring is provided at one end of the drill jig support arm 11 for mounting the drill sleeve 12. The fixing bolt 10 passes through the third adjustment groove and is connected by a fixing washer 8 and a fixing nut 9. The fixing bolt 10 can slide in the second and third adjustment grooves. The drill jig support arm 11 provides support for the drill sleeve 12, and the connecting ring at the end of the drill jig support arm 11 is sleeved on the outside of the drill sleeve. Specifically, an annular groove is formed on the inner wall of the connecting ring, and a stepped groove that mates with the annular groove is formed on the outer wall of the drill sleeve 12. The drill sleeve 12 is assembled onto the connecting ring from top to bottom, so that the stepped groove is supported on the annular groove, achieving axial positioning of the drill sleeve 12. Figure 1 As shown, after adjusting the posture of the drill jig support arm 11 during use, tighten the fixing nut 2 9 to fix the drill jig support arm 11 onto the drill jig adapter 4; there are a total of 2 fixing shims 2 8, which are used to fix the bolt head of the fixing bolt 2 10 and the contact surface between the fixing nut 2 9 and the drill jig support arm 11 and the drill jig adapter 4, respectively, to protect the tooling structure during tightening and avoid crushing damage.

[0024] The drill bushing 12 has a drilled hole, and the locating pin 13 passes through the drilled hole, such as... Figure 2 As shown; the locating pin 13 and the drill sleeve 12 are used to locate the mounting hole on the L-shaped structural component to be replaced, and the drill sleeve 12 is also used to drill the mounting hole on the new L-shaped structural component in conjunction with the reamer.

[0025] Positioning column 14 is arranged on the side of drill jig base 2, and the upper end surface of positioning column 14 is used to contact with the L-shaped structural member, limit the displacement of the L-shaped structural member in the up-down direction, and play the role of positioning and supporting the L-shaped structural member. There are two positioning columns 14 in total, which are used to support the two ends of the part to ensure stability; the connecting line between the axes of the two positioning columns 14 is parallel to the direction of the connecting plate of drill jig base 2. The lower end surface of positioning column 14 is fixed on base plate 1 through fastening screw four 15; positioning column 14 is in a cylindrical tube type structure, and the upper end is provided with a hole, which is used to extend into a tool, disassemble fastening screw four 15 below, and seal the lower end of positioning column 14.

[0026] The back plate 19 is in an L-shaped structure, as shown in Figure 3 One surface of back plate 19 is fixed on base plate 1 through fastening screw two 21, and the other surface is a first positioning surface. The first positioning surface is parallel to the connecting plate of drill jig base 2, is perpendicular to base plate 1, is used to cooperate with the mounting surface of the L-shaped structural member, limit the displacement of the L-shaped structural member in the width direction, and play the role of positioning the L-shaped structural member. Threaded holes are formed in the first positioning surface of back plate 19, and pressure plate bolt 20 is arranged in the threaded holes. The purpose of fixing the L-shaped structural member is achieved by fastening pressure plate 22 through rotating pressure plate bolt 20. A pair of back plates 19 are arranged to ensure the stability of clamping.

[0027] The pressure plate 22 is a flat plate, as shown in Figure 4 A pair of pressure plates 22 are arranged, and the pressure plates 22 are arranged on the inner side of back plate 19. Axial holes are formed in pressure plate 22, and pressure plate bolt 20 is connected to the first positioning surface of back plate 19 through the axial holes. Pressure plate nut 24 is arranged on pressure plate bolt 20. The pressure plate bolt 20 is located below the L-shaped structural member, the pressure plate 22 is located on the inner side of the L-shaped structural member by rotating the pressure plate 22, the L-shaped structural member is adjusted to the position, and then the pressure plate nut 24 is locked, so that the pressure plate 22 is fixed to clamp the part. Pressure plate gasket 23 is used to protect pressure plate 22 when the pressure plate nut 24 is locked.

[0028] The end surface positioner 16 is in an L-shaped structure, as shown in Figure 3 The end surface positioner 16 plays the role of positioning the L-shaped structural member. One surface of end surface positioner 16 is fixed on base plate 1 through fastening screw three 17. The other surface of end surface positioner 16 is a second positioning surface, threaded holes are formed in the second positioning surface, and end surface bolt 18 is arranged in the threaded holes. The end of end surface bolt 18 is used to tightly press the end of the L-shaped structural member, and plays the role of limiting the length direction of the L-shaped structural member.

[0029] On the basis of the above technical scheme, the application further provides a high-precision assembly method of an L-shaped structural member. The L-shaped structural member to be replaced is L-shaped structural member one; the new L-shaped structural member is L-shaped structural member two; the L-shaped structural member comprises mounting surface A and mounting surface B which are perpendicular to each other, and mounting holes need to be prepared on the two mounting surfaces; and the method comprises the following steps. Step 1, fix the L-shaped structure part one to be replaced.

[0030] Remove the L-shaped structure part one to be replaced from the body, support the inner side of one mounting surface A of the L-shaped structure part one on the positioning column 14, and make the outer side of the other mounting surface B fit with the first positioning surface of the back plate 19; use a tool to turn the end face bolt 18, adjust the extension amount of the end face bolt 18 relative to the end face positioner 16, and press against the side end face of the L-shaped structure part one; adjust the position of the pressing plate 22 so that the pressing plate 22 is located on the inner side of the mounting surface B, and then lock the pressing plate nut 24 to make the two sets of pressing plates 22 clamp the mounting surface B.

[0031] Step 2, adjust the position of the drill jig arm 11.

[0032] Install the drill sleeve 12 into the connecting ring at the end of the drill jig arm 11, and then insert the positioning pin 13 into the drill sleeve 12; then move the drill jig adapter 4 on the sliding groove of the drill jig base 2, adjust the position of the drill jig arm 11 by using the third adjusting groove on the drill jig arm 11, so that the positioning pin 13 is inserted into the first mounting hole of the mounting surface A of the L-shaped structure part one; then tighten the fixing nut two 9 to fix the position of the drill jig arm 11 on the drill jig adapter 4; tighten the fixing nut one 6 to fix the drill jig adapter 4 and the drill jig base 2.

[0033] Step 3, fix the new L-shaped structure part two.

[0034] Remove the positioning pin 13 and loosen the pressing plate bolt 20, and then remove the L-shaped structure part one; then install a new L-shaped structure part two using the same installation method as the L-shaped structure part one in step 1.

[0035] Step 4, drill holes on the mounting surface A of the L-shaped structure part two.

[0036] Drill the first mounting hole on the L-shaped structure part two through the drill hole on the drill sleeve 12; remove the new L-shaped structure part two after drilling; reinstall the L-shaped structure part one according to the method of step 1, and adjust the position of the positioning pin 13 according to the method of step 2 so that the positioning pin 13 is inserted into the next mounting hole to fix the drill jig arm 11 and the drill jig adapter 4, remove the positioning pin 13 and then remove the L-shaped structure part two, replace the L-shaped structure part one, and then drill the next mounting hole through the drill sleeve 12; repeat the step to complete the drilling of all mounting holes on the mounting surface A of the L-shaped structure part two.

[0037] Step 5, position the mounting surface B of the L-shaped structure part two.

[0038] The L-shaped structure A with the installation hole on the installation surface A is fixed on the installation position of the aircraft body by using the installation bolt, the drill sleeve is installed in the corresponding bolt hole of the aircraft body on the other installation surface B, and the initial hole is drilled on the installation surface B by using the reamer through the drill sleeve; and the L-shaped structure two with the initial hole is removed.

[0039] Step 6, repositioning the L-shaped structure two.

[0040] The L-shaped structure two is installed on the assembling device with the installation surface B upward, and then the position of the drill jig arm 11 is adjusted by using the method of step 2, so that the positioning pin 13 is inserted into the initial hole, the drill jig arm 11 and the drill jig adapter 4 are fixed, and then the initial hole is expanded to the size of the installation hole by using the reamer through the drill hole on the adapter 12; after all the initial holes are expanded by using the same method, the L-shaped structure two is removed, and the preparation of all the holes is completed, and at this time, the L-shaped structure two can be installed.

[0041] The above examples are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by the equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A high-precision assembly device for L-shaped structural members, characterized by comprising: The application relates to a drilling jig base plate, which comprises a base plate (1) and a drilling jig base (2), a positioning column (14) and a back plate (19) arranged on the base plate (1); wherein the positioning column (14) is arranged between the drilling jig base (2) and the back plate (19), the drilling jig base (2) is provided with a position-adjustable drilling jig adapter (4), the drilling jig adapter (4) is provided with a position-adjustable drilling jig arm (11), the end of the drilling jig arm (11) is equipped with a drill sleeve (12), and a positioning pin (13) is detachably arranged on the drill sleeve (12); an L-shaped structural member is assembled on the upper portion of the positioning column (14) in a manner that one mounting surface faces upwards, and is fixed by clamping through a pressing plate (22) arranged on the back plate (19) after being positioned in the width direction by the back plate (19) and positioned in the end surface by an end surface positioner (16), and then the mounting hole of the to-be-prepared L-shaped structural member is positioned by the positioning pin (13) and the hole is drilled by the drill sleeve (12).

2. The high-precision assembly device for L-shaped structural members according to claim 1, wherein The drilling jig adapter (4) is in an L-shaped structure; the shorter side of the drilling jig adapter (4) is in plane cooperation with the drilling jig base (2), and the longer side is connected with the drilling jig arm (11); a fixing bolt (7) is assembled in a sliding groove on the drilling jig base (2), the fixing bolt (7) penetrates through a first adjusting groove on the shorter side of the drilling jig adapter (4) and is connected through a fixing nut (6).

3. The high-precision assembly device for L-shaped structural members according to claim 1, wherein The longer side of the drilling jig adapter (4) is perpendicular to the surface of the base plate (1), a second adjusting groove is longitudinally formed on the longer side, and a fixing bolt (10) is assembled in the second adjusting groove; a third adjusting groove is formed on the drilling jig arm (11), and a connecting ring is arranged at one end of the drilling jig arm (11) for mounting the drill sleeve (12); the fixing bolt (10) penetrates through the third adjusting groove and is connected through a fixing nut (9).

4. The high-precision assembly device for L-shaped structural members according to claim 1, wherein The connecting ring of the end of the drilling jig arm (11) is sleeved outside the drill sleeve; an annular clamping groove is formed on the inner wall of the connecting ring, a stepped groove matched with the annular clamping groove is arranged on the outer wall of the drill sleeve (12); the drill sleeve (12) is assembled on the connecting ring from top to bottom, so that the stepped groove is supported on the annular clamping groove, and the axial position of the drill sleeve (12) is limited.

5. The high-precision assembly device for L-shaped structural members according to claim 1, wherein The drill sleeve (12) has a drilling hole, and the positioning pin (13) penetrates through the drilling hole; the positioning pin (13) and the drill sleeve (12) are used for positioning the mounting hole on the L-shaped structural member to be replaced, and the drill sleeve (12) is also used for drilling the mounting hole on the replaced L-shaped structural member in cooperation with a reamer.

6. The high-precision assembly device for L-shaped structural members according to claim 1, wherein The upper end surface of the positioning column (14) is used for contacting the L-shaped structural member and limiting the displacement of the L-shaped structural member in the up-down direction; the positioning column (14) is provided with a pair of positioning columns (14), and the connecting line between the axes of the two positioning columns (14) is parallel to the connecting plate direction of the drilling jig base (2).

7. The high-precision assembly device for L-shaped structural members according to claim 1, wherein The back plate (19) is in an L-shaped structure, one surface of the back plate (19) is fixed on the base plate (1), the other surface is a first positioning surface, the first positioning surface is parallel to the connecting plate of the drilling jig base (2), the first positioning surface is perpendicular to the base plate (1) and is used for cooperating with the mounting surface of the L-shaped structural member and limiting the displacement of the L-shaped structural member in the width direction.

8. The high-precision assembly device for L-shaped structural members according to claim 1, wherein A threaded hole is formed on the first positioning surface of the back plate (19), and a pressing plate bolt (20) is arranged in the threaded hole; a pressing plate (22) is arranged on the inner side of the back plate (19), and an axial hole is formed on the pressing plate (22), and the pressing plate bolt (20) is connected to the first positioning surface of the back plate (19) through the axial hole; a pressing plate nut (24) is arranged on the pressing plate bolt (20).

9. The high-precision assembly device for L-shaped structural members according to claim 1, wherein The end face positioner (16) is in an L-shaped structure, one face of the end face positioner (16) is fixed on the base plate (1), and the other face is a second positioning surface, a threaded hole is formed on the second positioning surface, and an end face bolt (18) is arranged in the threaded hole; the end of the end face bolt (18) is used to tightly press against the end of the L-shaped structure, and the length direction of the L-shaped structure is limited.

10. A high-precision assembly method for L-shaped structural members, characterized by Comprise: Step 1, remove the L-shaped structure one from the engine, support one mounting surface A of the L-shaped structure one on the positioning column (14) on the inner side, and make the other mounting surface B on the outer side abut against the first positioning surface of the back plate (19); adjust the end face bolt (18) relative to the end face positioner (16) by rotating the end face bolt (18), and press against the side end face of the L-shaped structure one; adjust the position of the pressing plate (22) so that the pressing plate (22) is located on the inner side of the mounting surface B, and then lock the pressing plate nut (24) to clamp the mounting surface B by the two groups of pressing plates (22); Step 2, arrange the drill sleeve (12) in the connecting ring at the end of the drill jig arm (11), and then insert the positioning pin (13) into the drill sleeve (12); then move the drill jig adapter (4) on the sliding groove of the drill jig base (2), adjust the position of the drill jig arm (11), so that the positioning pin (13) is inserted into the first mounting hole of the mounting surface A of the L-shaped structure one; then tighten the fixing nut two (9) to fix the position of the drill jig arm (11) on the drill jig adapter (4); tighten the fixing nut one (6) to fix the drill jig adapter (4) and the drill jig base (2); Step 3, remove the positioning pin (13), loosen the pressing plate bolt (20), and remove the L-shaped structure one; then install a new L-shaped structure (2) by the same method as the L-shaped structure one in step (1); Step 4, use the reamer to prepare the first mounting hole on the L-shaped structure two through the drill hole on the drill sleeve (12); remove the new L-shaped structure two after drilling; reinstall the L-shaped structure one according to the method of step (1), and adjust the position of the positioning pin (13) according to the method of step (2) so that the positioning pin (13) is inserted into the next mounting hole to fix the drill jig arm (11) and the drill jig adapter (4), remove the positioning pin (13) and then remove the L-shaped structure two, replace the L-shaped structure one, and then prepare the next mounting hole through the drill sleeve (12); repeat the step to complete the preparation of all mounting holes on the mounting surface A of the L-shaped structure two; Step 5, the L-shaped structure member A with the installation holes on the installation surface A is fixed on the installation position of the aircraft body using the installation bolts, the drill bushings are sequentially installed in the corresponding bolt holes of the aircraft body on the other installation surface B, and the initial holes are drilled on the installation surface B using the reamer through the drill bushings; the L-shaped structure member two with the initial holes is removed; Step 6, the L-shaped structure member two is installed on the assembling device with the installation surface B facing upwards, then the position of the drill jig branch (11) is adjusted using the method of step (2), the positioning pin (13) is inserted into the initial hole, the drill jig branch (11) and the drill jig adapter (4) are fixed, then the initial hole is expanded to the size of the installation hole through the drill hole on the adapter (12) using the reamer, and the L-shaped structure member two is removed after the initial holes are expanded using the same method, and the hole preparation is completed, and the L-shaped structure member two can be installed and used at this time.

Images