Large aircraft high-precision large-size rotary table transition piece pose adjustment method

Abstract

The present application belongs to the field of aircraft assembly, and relates to a large aircraft high-precision large-size rotary table transition piece pose adjustment method, comprising the following steps: S1: positioning the rotary table transition piece, and forming a barrel section product with the wall plate; S2: installing a cup cone ball head and a high-throw column joint on the barrel section product; S3: adjusting the position of the barrel section product until the cup cone ball head falls into the cup cone seat; S4: measuring the flatness of the upper surface of the rotary table transition piece, and if the flatness is less than a threshold value, the rotary table transition piece pose adjustment is completed, otherwise, S5 is entered; S5: connecting the adjusting mechanism with the high-throw column joint to lift the barrel section product, and adjusting the rotary table transition piece pose through the adjusting mechanism.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of aircraft assembly and relates to a large aircraft high-precision large-size rotary table transition piece pose adjustment method. BACKGROUND

[0002] The rotary table transition piece is a reference piece for installing a radome, and the correctness of the pose of the rotary table transition piece plays a key role in the aerodynamic shape and functional use of the radome. In order to ensure the functional use and overall requirements of the radome, the relative deviation of the Z-direction pose of the upper surface of the rotary table transition piece is only ±1mm, but due to the large size (8700mm high) of the product, the complex structure of the key parts, and the long / complex coordination path of assembly, it is a great technical difficulty to ensure the correct pose control of the transition piece. Therefore, in order to ensure the rapid development of the product and ensure the control of quality and precision, a reliable and efficient positioning and pose control technology is urgently needed. SUMMARY

[0003] The application aims to solve the problem of rotary table transition piece pose control difficulty and proposes a large aircraft high-precision large-size rotary table transition piece pose adjustment method.

[0004] TECHNICAL SCHEME

[0005] A large aircraft high-precision large-size rotary table transition piece pose adjustment method comprises the following steps:

[0006] S1: Position the rotary table transition piece and form a barrel segment product with the wall plate;

[0007] S2: Install a cup cone ball head and a high-throw column joint on the barrel segment product;

[0008] S3: Adjust the position of the barrel segment product until the cup cone ball head falls into the cup cone seat;

[0009] S4: Measure the flatness of the upper surface of the rotary table transition piece. If the flatness is less than a threshold value, the rotary table transition piece pose adjustment is ended, otherwise, S5 is entered:

[0010] S5: Connect the adjusting mechanism to the high-throw column joint to lift the barrel segment product, and adjust the pose of the rotary table transition piece through the adjusting mechanism.

[0011] Further, S1: the rotary table transition piece positioning process is as follows:

[0012] The rotary table transition piece is connected to the pipe beam standard tooling, and the flatness of the pipe beam standard tooling and the rotary table transition piece is 0.15mm;

[0013] Adjust the position of the pipe beam standard tooling until the V-shaped block below the pipe beam standard tooling falls into the V-shaped groove of the falling type frame;

[0014] The V-shaped groove of the mold frame is arranged at the theoretical position of the rotary table transition piece.

[0015] Through coordination of the pipe beam standard tooling, coordinated accuracy of 0.015 mm of the upper surface flatness of the transition piece can be achieved; through the V-shaped block / groove matching structure, the pipe beam standard tooling can be quickly and accurately positioned on the mold frame.

[0016] Further, in S1, the bucket section product is formed by combining the rotary table upper surface with components such as the support and the wall plate.

[0017] Further, in S2, two cup cone ball heads A and B are installed at the frame edge position of the lower surface of the bucket section product; the distance between the cup cone ball heads is D.

[0018] Four high-throw column joints are respectively installed on the left and right sides of the bucket section product, and the high-throw column joints are installed at the maximum outer contour of the bucket section product.

[0019] By setting the high-throw column joint at the maximum contour, the mechanism adjustment stroke ratio can be maximally reduced, and the pose adjustment of the product can be quickly achieved.

[0020] Further, in S3, the cup cone ball head A is used as a positioning reference, the cup cone ball head A is contacted and positioned with the cup cone seat A, the cup cone ball head A is used as a rotation axis, and the bucket section product is naturally lowered to the cup cone ball head B and the cup cone seat B are contacted and positioned.

[0021] The cup cone ball head A and the cup cone seat A are gap matched; the cup cone seat B is a long circular hole in the X direction, and the cup cone ball head B and the cup cone seat B are gap matched in the Y and Z directions; the matching gap is 0.1 mm.

[0022] The X direction is the heading of the aircraft, the Y direction is the lateral direction, and the Z direction is the vertical direction.

[0023] Further, in S4, the measurement of the attitude of the upper surface of the rotary table transition piece is as follows: the three-axis coordinates of each hole of the upper surface of the rotary table transition piece are measured, the maximum value and the minimum value of the Z-axis coordinates are compared, and the difference between the two is taken as the flatness of the upper surface of the rotary table transition piece.

[0024] The threshold value is 2 mm.

[0025] Further, in S5, the number of adjustment mechanisms is four, which are respectively denoted as left one, left two, right one, and right two; and correspond to the four high-throw column joints respectively.

[0026] Each adjustment mechanism is provided with X, Y, and Z direction adjustment units, and the top of the adjustment mechanism is provided with a ball socket; the ball socket position is adjusted through the X, Y, and Z direction adjustment units.

[0027] Further, in S5, first, the four adjusting mechanisms are moved to be right below the joint of the throwing column, and then the adjusting mechanisms are controlled to be raised to realize the cooperation of the ball socket and the joint of the throwing column, until the cup cone ball head is separated from the cup cone seat.

[0028] Further, in S5, the process of adjusting the pose of the rotary table transition piece by the adjusting mechanism comprises:

[0029] measuring the absolute deviation of the measured coordinate value of the upper surface of the rotary table transition piece from the theoretical position value; and adjusting the barrel segment product by the four adjusting mechanisms until the absolute deviation is less than a threshold value.

[0030] Further, in S5, the process of adjusting the pose of the rotary table transition piece by the adjusting mechanism further comprises: measuring the relative deviation of the measured coordinate value of the upper surface of the rotary table transition piece from the theoretical position value in the Z direction;

[0031] the relative deviation is the maximum value in the Z direction coordinate difference values of the holes on the upper surface of the rotary table transition piece;

[0032] determining the two holes corresponding to the maximum value in the Z direction coordinate difference values; and adjusting the barrel segment product by the four adjusting mechanisms according to the three-dimensional coordinates of the two holes until the relative deviation is less than a threshold value;

[0033] The adjustment comprises XZ plane adjustment and YZ plane adjustment.

[0034] Through the fine adjustment of the adjusting mechanism, the problem that the flatness of the upper surface of the transition piece exceeds the threshold value due to assembly error can be solved.

[0035] Beneficial effects:

[0036] The present application realizes the accurate control of the position and pose of the upper surface of the transition piece by the multi-positioning mode, the coordination accuracy of the standard tool, the double positioning system of the cup cone and the adjusting mechanism, and the reasonable installation method.

[0037] The present application can be popularized to the accurate control of the position and pose of other large-size structure products, can effectively ensure the quality of the products, and greatly reduces the manufacturing cost of the products, has great social benefits and economic value. BRIEF DESCRIPTION OF DRAWINGS

[0038] The present application comprises 6 drawings, and the drawings and the drawings are as follows:

[0039] Figure 1 the position and pose control process of the upper surface of the rotary table transition piece;

[0040] Figure 2 the schematic diagram of the pipe beam standard tool;

[0041] Figure 3 the schematic diagram of the joint installation position;

[0042] Figure 4 This is a schematic diagram of the attitude control of the adjustment mechanism;

[0043] Figure 5 A schematic diagram for calculating the orientation deviation of the main view;

[0044] Figure 6 This is a schematic diagram for calculating the directional deviation in the left view.

[0045] The product has two sets of cup cones, A and B, installed on its lower surface, and adjustment mechanisms are provided on the left and right sides to achieve attitude adjustment and control in the X, Y, and Z directions. Detailed Implementation

[0046] This invention provides a method for adjusting the position and attitude of a large-size turntable transition component in a large aircraft with high precision. It employs a dual positioning system consisting of a standard tubular beam tooling coordination point, a cup cone, and an adjustment mechanism. (See attached diagram.) Figure 1 The flowchart shown is for the control of the upper surface of the transition piece. The specific steps are as follows:

[0047] ① Combining to form barrel segment products

[0048] As attached Figure 2 As shown, 20 φ24 precision bolts are used to connect the standard tooling of the pipe beam to the turntable transition piece. The flatness of the upper surface of the transition piece is 0.3mm, and the flatness of the mating surface of the standard tooling of the pipe beam is 0.15mm. Using the upper surface of the transition piece as the assembly datum, it is combined with the bracket, wall panel and other components to form a barrel section product with a height of 8.7m.

[0049] ② Install the boom joint and cup cone on the barrel section product.

[0050] As attached Figure 3 As shown, cup cones A and B are installed on the lower surface of the barrel segment product. The cup cone structure is in the form of a ball head, and the two cup cones are 2900mm apart, respectively set at the frame edge of the barrel segment product.

[0051] Four high-lift column joints are installed on the left and right sides of the barrel section product, respectively. The high-lift column joints are installed at the maximum outer contour of the product, that is, at a diameter of 5.3m.

[0052] ③ Cup and cone insertion

[0053] The cup cone consists of a cup cone ball head and a cup cone seat. The position control of the product is achieved when the two come into contact.

[0054] With A cup cone as the main positioning reference, first contact the A cup cone ball head with the cup cone seat (cooperating clearance 0.1mm), control the X, Y, Z direction position of the barrel segment product; with A point as the rotation axis, the barrel segment product naturally falls to B cup cone and cup cone contact, at this time, in order to ensure the barrel segment product stress natural release, prevent product damage during the process of entering, the B cup cone seat is set as X direction long circular hole structure, control the rotation of barrel segment product around X, Y, Z axis; finally, the supporting bracket is lifted, used to support the weight of barrel segment product. Through the entering of A, B cup cone, the control of barrel segment product in space six degrees of freedom is realized.

[0055] ④Laser tracker measures the position and posture of the upper surface of the transition piece

[0056] Establish the aircraft coordinate system, use the laser target ball to measure the 20 holes on the upper surface of the transition piece in turn, form the X, Y, Z coordinate system of the 20 holes, calculate the maximum height difference as the flatness of the upper surface of the transition piece, that is, flatness = Z max -Z min .

[0057] Evaluate the flatness, if less than 2mm, proceed to the subsequent butt joint work; if greater than 2mm, continue according to the following steps.

[0058] ⑤Connect the adjusting mechanism to the throwing column joint of the barrel segment product, control the flatness of the upper surface of the transition piece of the rotary table through X, Y, Z direction adjustment

[0059] Brief introduction of adjusting mechanism: the adjusting mechanism controls the sliding of the sliding rail, the driving of the ball screw and the lifting machine through the rotation of the hand wheel, sets the active adjusting unit and the driven adjusting unit in X, Y direction, realizes the adjustment of X direction through the lifting machine.

[0060] First, rotate the X, Y direction hand wheel, adjust the X, Y direction of the adjusting mechanism to the right below the throwing column joint, then rotate the Z direction hand wheel, raise the adjusting mechanism along the Z direction, realize the cooperation of the ball socket of the adjusting mechanism and the throwing column joint. According to this method, complete the connection of the adjusting mechanism in the left 1, left 2, right 1 and right 2 throwing column joints in turn.

[0061] The specific adjustment method is as follows:

[0062] Among them, X S is the measured coordinate value (variable) in X direction, X L is the theoretical coordinate value (constant) in X direction, σ x is the deviation in X direction = X S -X L , positive indicates that the product is backward (right, up) relative to the theoretical position, negative indicates that the product is forward (left, down) relative to the theoretical position, σ zxd indicates the relative deviation in Z direction, σ zxd = Zs1 -Z s2 The Y and Z directions are represented in the same way.

[0063] Only when there is an absolute deviation σ in the X direction x When rotating the X-direction handwheel (σ) of the left 1, left 2, right 1, and right 2 mechanisms, x When the time is positive, rotate clockwise; σ x When the value is negative, rotate counterclockwise (the rotation value is σ). x +0.5mm (deformation compensation).

[0064] Only when there is an absolute deviation σ in the Y direction y When rotating the Y-direction handwheel (σ) of the left 1, left 2, right 1, and right 2 mechanisms, y When the time is positive, rotate clockwise; σ y When the value is negative, rotate counterclockwise (the rotation value is σ). y +0.5mm (deformation compensation).

[0065] σ only when there is an absolute deviation in the Z direction z When rotating the Z-direction handwheel (σ) of the left 1, left 2, right 1, and right 2 mechanisms, z When the time is positive, rotate clockwise; σ z When the value is negative, rotate counterclockwise (the rotation value is σ). Z +0.5mm (deformation compensation).

[0066] When there is a relative deviation σ in the Z direction zxd At this time, the absolute deviation σ in the Z direction should be calculated first. z Once the adjustment is in place, then adjust the relative deviation.

[0067] Calculated from the front view direction, there is a relative deviation σ between hole 1 and hole 2. zxd When the value is positive, the Z-direction handwheel of the left 1 and left 2 adjustment mechanisms should be rotated clockwise by a value of (X). 左2 -X 孔1 )sin{arcsin[σ zxd / (X 孔2 -X 孔1 )]}+0.5mm (deformation compensation); simultaneously rotate the X-direction handwheels of the left 1 and left 2 adjustment mechanisms counterclockwise, the rotation value is (X 左2 -X 孔1 )-cos{arcsin[σ zxd / (X left 2 - X hole 1)]}+0.5mm (deformation compensation).

[0068] Calculated from the left view direction (see appendix) Figure 6 Assume there is a relative deviation σ between hole 3 and hole 4. zxd, and is negative, at this time should clockwise rotate the left 1, right 1 adjusting mechanism Z direction hand wheel, the number of rotations is (Y 左1 -Y 右1 )sin{arcsin[σ zxd / (Y 孔2 -Y 孔1 )]}+0.5mm (deformation compensation) ; while counterclockwise rotate the left / right 1 adjusting mechanism Y direction hand wheel, the number of rotations is (Y 左1 -Y 右1 )-cos{arcsin[σ zxd / (Y 孔2 -Y 孔1 )]}+0.5mm (deformation compensation).

[0069] Embodiment:

[0070] From the front view direction calculation, see attached Figure 5 , assuming that hole 1 and hole 2 exist relative deviation σzxd, and is positive, at this time should clockwise rotate the left 1, left 2 adjusting mechanism Z direction hand wheel, the number of rotations is (1300+1200)sin(arcsin(σzxd / 1200))+0.5mm (deformation compensation) ; while counterclockwise rotate the left 1, left 2 adjusting mechanism X direction hand wheel, the number of rotations is (13+1200)-cos(arcsin(σzxd / 1200))+0.5mm (deformation compensation).

[0071] From the left view direction calculation, see attached Figure 6 , assuming that hole 3 and hole 4 exist relative deviation σ zxd , and is negative, at this time should clockwise rotate the left 1, right 1 adjusting mechanism Z direction hand wheel, the number of rotations is (3100+1200)sin(arcsin(σ zxd / 1200))+0.5mm (deformation compensation) ; while counterclockwise rotate the left 1, right 1 adjusting mechanism Y direction hand wheel, the number of rotations is (31+1200)-cos(arcsin(σ zxd / 1200))+0.5mm (deformation compensation).

Claims

1. A large aircraft high-precision large-size rotary table transition piece pose adjustment method, characterized in that: The method comprises the following steps: S1: positioning the rotary table transition piece and combining the wall plate to form a barrel segment product; S2: installing cup cone ball heads and high throw column joints on the barrel segment product; S3: adjusting the position of the barrel segment product until the cup cone ball heads fall into the cup cone seats; S4: measuring the flatness of the upper surface of the rotary table transition piece, if the flatness is less than a threshold value, the adjustment of the position of the rotary table transition piece ends, otherwise, S5 is entered: S5: connecting the adjusting mechanism to the high throw column joint to lift the barrel segment product, and adjusting the position of the rotary table transition piece through the adjusting mechanism; the number of adjusting mechanisms is four, which are respectively recorded as left one, left two, right one and right two; and correspond to the four high throw column joints respectively; Each adjusting mechanism is provided with X, Y and Z direction adjusting units, and the top of the adjusting mechanism is provided with a ball socket; the position of the ball socket is adjusted through the X, Y and Z direction adjusting units; Firstly, the four adjusting mechanisms are respectively moved to the positions directly below the high throw column joints, then the adjusting mechanisms are controlled to be lifted to realize the cooperation of the ball sockets and the high throw column joints, until the cup cone ball heads are separated from the cup cone seats; The absolute deviation of the measured coordinate value of the upper surface of the rotary table transition piece from the theoretical position value is measured; the barrel segment product is adjusted through the four adjusting mechanisms until the absolute deviation is less than a threshold value; The relative deviation of the measured coordinate value of the upper surface of the rotary table transition piece from the theoretical position value in the Z direction is measured; The relative deviation is the maximum value in the Z direction coordinate difference value of each hole on the upper surface of the rotary table transition piece; The two holes corresponding to the maximum value in the Z direction coordinate difference value are determined; the barrel segment product is adjusted through the four adjusting mechanisms according to the three-dimensional coordinates of the two holes until the relative deviation is less than a threshold value; The adjustment includes XZ plane adjustment and YZ plane adjustment.

2. The method of claim 1, wherein: S1: the positioning process of the rotary table transition piece is as follows: The rotary table transition piece is connected to the pipe beam standard tooling, and the flatness of the surface of the pipe beam standard tooling and the rotary table transition piece is 0.015mm; The position of the pipe beam standard tooling is adjusted until the V-shaped block below the pipe beam standard tooling falls into the V-shaped groove of the falling mold; The V-shaped groove of the mold is arranged at the theoretical position of the rotary table transition piece.

3. The method of claim 2, wherein: In S1, the wall plate and the rotary table transition piece are combined from top to bottom with the upper surface of the rotary table as the reference.

4. The method of claim 3, wherein: In S2, two cup cone ball heads A and B are installed at the frame edge position of the lower surface of the barrel segment product; the distance between the cup cone ball heads is D; Four high throw column joints are respectively installed on the left and right sides of the barrel segment product, and the high throw column joints are installed at the maximum outer contour of the barrel segment product.

5. The method of claim 4, wherein: In S3, the cup cone ball head A is taken as the positioning reference, the cup cone ball head A is contacted and positioned into the cup cone seat A, and the barrel segment product is naturally lowered to the position where the cup cone ball head B is contacted and positioned into the cup cone seat B with the cup cone ball head A as the rotation axis; The cup cone ball head A and the cup cone seat A are gap fitted; the cup cone seat B is a long circular hole in the X direction, and the cup cone ball head B and the cup cone seat B are gap fitted in the Y and Z directions; the fitting gap is 0.1mm; The X direction is the heading direction of the aircraft, the Y direction is the lateral direction, and the Z direction is the vertical direction.

6. The method of claim 5, wherein: In S4, the posture measurement process of the upper surface of the rotary table transition piece is as follows: the three-axis coordinates of each hole on the upper surface of the rotary table transition piece are measured, the maximum and minimum values of the Z-axis coordinates are compared, and the difference between the two is taken as the flatness of the upper surface of the rotary table transition piece; The threshold value is 2mm.

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