Pose adjusting method for high-precision large-size turntable transition piece of large aircraft

Abstract

The invention belongs to the field of aircraft assembly, and relates to a large aircraft high-precision large-size turntable transition piece pose adjusting method which comprises the following steps: S1, positioning a turntable transition piece, and forming a barrel section product with a wall plate; s2, a cup cone ball head and a throwing high column connector are installed 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, the flatness of the upper surface of the rotary table transition piece is measured, if the flatness is smaller than a threshold value, position and posture adjustment of the rotary table transition piece is finished, and if not, the step S5 is executed; and S5, an adjusting mechanism is connected with the throwing height column connector to jack up the barrel section product, and the position and posture of the rotary table transition piece are adjusted through the adjusting mechanism.

Description

Technical Field

[0001] The invention belongs to the field of aircraft assembly and relates to a method for adjusting the position and posture of a transition piece of a large-scale turntable with high precision. Background Art

[0002] The turntable transition piece is the reference piece for installing the radome, and the correctness of its position and posture 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 posture of the upper surface of the turntable transition piece is required to be only ±1mm. However, due to the large size of the product (8700mm high), the complex structure of key parts, and the long / complex coordination path of the assembly, ensuring the correct position and posture control of the transition piece is a major technical difficulty; therefore, in order to ensure the rapid development of the product and the control of quality accuracy, a reliable and efficient positioning and posture control technology is urgently needed. Summary of the invention

[0003] The purpose of the present invention is to solve the problem of difficult position and attitude control of a turntable transition piece, and propose a high-precision and large-size turntable transition piece position and attitude adjustment method for a large aircraft.

[0004] Technical Solution

[0005] A method for adjusting the position and posture of a transition piece of a large-scale turntable with high precision for a large aircraft comprises the following steps:

[0006] S1: Position the turntable transition piece and form the barrel section product with the wall plate;

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

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

[0009] S4: Measure the flatness of the upper surface of the turntable transition piece. If the flatness is less than the threshold, the turntable transition piece posture adjustment is completed, otherwise enter S5:

[0010] S5: Connect the adjusting mechanism to the lifting column joint to lift the barrel section product, and adjust the position of the turntable transition piece through the adjusting mechanism.

[0011] Further, S1: the positioning process of the turntable transition piece is as follows:

[0012] Connect the turntable transition piece to the standard fixture of the pipe beam. The flatness of the fitting surface between the standard fixture of the pipe beam and the turntable transition piece is 0.15mm.

[0013] Adjust the position of the standard fixture for the pipe beam until the V-shaped block under the standard fixture for the pipe beam falls into the V-shaped groove of the jig;

[0014] The V-groove of the jig is arranged at the theoretical position of the turntable transition piece.

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

[0016] Furthermore, in S1, the upper surface of the turntable is used as a reference and combined with components such as brackets and wall panels to form a barrel segment product.

[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 barrel section product; the distance between the cup-cone ball heads is D;

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

[0019] By setting a high-throw column joint at the maximum contour, the adjustment stroke ratio of the mechanism can be minimized and the position and posture 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 brought into contact with the cup-cone seat A, and the cup-cone ball head A is used as a rotation axis to control the barrel section product to fall naturally until the cup-cone ball head B is brought into contact with the cup-cone seat B;

[0021] The cup-cone ball head A and the cup-cone seat A are clearance fit; the cup-cone seat B is an oblong hole in the X direction, and the cup-cone ball head B and the cup-cone seat B are clearance fit in the Y and Z directions; the fit clearance is 0.1mm;

[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 process of measuring the posture of the upper surface of the turntable transition piece is as follows: measuring the three-axis coordinates of each hole on the upper surface of the turntable transition piece, comparing and obtaining the maximum and minimum values ​​of the Z-axis coordinates, and the difference between the two is used as the flatness of the upper surface of the turntable transition piece;

[0024] The threshold is 2mm.

[0025] Furthermore, in S5, the number of adjustment mechanisms is four, which are respectively recorded as left one, left two, right one, and right two; corresponding to the four high-throwing column joints;

[0026] Each adjustment mechanism is provided with adjustment units in three directions: X, Y and Z. A ball socket is provided on the top of the adjustment mechanism. The position of the ball socket is adjusted by the adjustment units in three directions: X, Y and Z.

[0027] Furthermore, in S5, the four adjustment mechanisms are first moved to the position directly below the high-throwing column joint, and then the adjustment mechanisms are controlled to rise to achieve the matching of the ball socket and the high-throwing column joint until the cup-cone ball head is separated from the cup-cone seat.

[0028] Further, in S5, the process of adjusting the position and posture of the turntable transition piece by the adjustment mechanism includes:

[0029] Measure the absolute deviation between the measured coordinate value and the theoretical position value of the upper surface of the turntable transition piece; adjust the barrel section product through four adjustment mechanisms until the absolute deviation is less than the threshold.

[0030] Further, in S5, the process of adjusting the position and posture of the turntable transition piece by the adjustment mechanism further includes: measuring the relative deviation between the measured coordinate value and the theoretical position value of the upper surface of the turntable transition piece in the Z direction;

[0031] The relative deviation is the maximum value of the Z-direction coordinate difference of each hole on the upper surface of the turntable transition piece;

[0032] Determine the two holes corresponding to the maximum value of the Z-axis coordinate difference; adjust the barrel section product through four adjustment mechanisms according to the three-dimensional coordinates of the two holes until the relative deviation is less than the threshold value;

[0033] The adjustment includes the adjustment of the XZ plane and the adjustment of the YZ plane.

[0034] The problem of the flatness of the upper surface of the transition piece exceeding a threshold value due to assembly errors can be solved by fine-tuning the adjustment mechanism.

[0035] Beneficial effects:

[0036] The present invention successfully realizes precise control of the position and posture of the upper surface of the transition piece by using a multi-positioning method, high coordination accuracy of the standard worker, a cup-cone and an adjustment mechanism dual positioning system, and a reasonable installation method.

[0037] The present invention can be extended to the precise control of the position and posture of other large-scale structural products, which can effectively ensure the quality of the products and greatly reduce the manufacturing costs of the products, thus having significant social benefits and economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention includes 6 drawings, and the drawings and the descriptions of the drawings are as follows:

[0039] Figure 1 It is the upper surface posture control process of the turntable transition part;

[0040] Figure 2 This is a schematic diagram of standard tooling for pipe beams;

[0041] Figure 3 This is a schematic diagram of the connector installation position;

[0042] Figure 4 It is a schematic diagram of the attitude control of the regulating mechanism;

[0043] Figure 5 This is a schematic diagram of the calculation of the main view direction deviation;

[0044] Figure 6 Schematic diagram of left view direction deviation calculation.

[0045] Two groups of cup cones A and B are installed on the lower surface of the product, and adjustment mechanisms are provided on the left and right sides of the product to achieve posture adjustment and control in the X, Y and Z directions. DETAILED DESCRIPTION

[0046] The present invention provides a method for adjusting the position and posture of a large-scale turntable transition piece of a large aircraft with high precision, which adopts a method of coordinating intersection points of standard pipe beam tooling + cup-cone and adjustment mechanism dual positioning system. Figure 1 The flowchart of the upper surface control of the transition piece is shown, and the specific steps are as follows:

[0047] ①Combined to form barrel segment products

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

[0049] ②Install the high-pole joint and cup-cone of 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 section product. The cup-cone structure is in the form of a ball head. The two cup-cones are 2900 mm apart and are respectively arranged at the frame edge of the barrel section product.

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

[0052] ③ Cup-cone placement

[0053] The cup-cone is composed of a cup-cone ball head and a cup-cone seat, and the position of the product is controlled when the two are in contact.

[0054] With the A cup cone as the main positioning reference, the A cup cone ball head is first put into contact with the cup cone seat (with a clearance of 0.1mm) to control the position of the barrel segment product in the X, Y, and Z directions; with point A as the rotation axis, the barrel segment product naturally falls until the B cup cone is put into contact with the cup cone. At this time, in order to ensure the natural release of the stress of the barrel segment product and prevent damage to the product during the positioning process, the B cup cone seat is set to an oblong hole structure in the X direction to control the rotation of the barrel segment product around the X, Y, and Z axes; finally, the support bracket is raised to support the weight of the barrel segment product. Through the positioning of the A and B cup cones, the barrel segment product is controlled in six degrees of freedom in space.

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

[0056] Establish an aircraft coordinate system, use a laser target ball to measure the 20 holes on the upper surface of the turntable transition piece in sequence, form the X, Y, and Z coordinate system of the 20 holes, and find 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 it is less than 2 mm, proceed with the subsequent docking work. If it is greater than 2 mm, proceed with the following steps.

[0058] ⑤ Connect the adjustment mechanism to the high-throwing column joint of the barrel section product, and control the upper surface of the turntable transition piece through adjustment in the X, Y, and Z directions.

[0059] Brief description of the adjustment mechanism: The adjustment mechanism controls the sliding of the slide rail, the ball screw, and the drive of the lift by turning the hand wheel. Active adjustment units and passive adjustment units are set in the X and Y directions, and the adjustment in the X direction is achieved through the lift.

[0060] First, turn the X and Y direction handwheels to adjust the X and Y directions of the adjustment mechanism to just below the high-throw column joint, and then turn the Z direction handwheel to raise the adjustment mechanism along the Z direction to achieve the match between the ball socket of the adjustment mechanism and the high-throw column joint. Follow this method to connect the adjustment mechanism to the left 1, left 2, right 1, and right 2 high-throw column joints in sequence.

[0061] The specific adjustment methods are as follows:

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

[0063] Only when there is an absolute deviation σ in the X direction x When turning the X direction hand wheel of the left 1, left 2, right 1, right 2 mechanism (σ x When σ is positive, it rotates clockwise; x When it is negative, it rotates counterclockwise), and 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 turning the Y direction handwheel of the left 1, left 2, right 1, and right 2 mechanisms (σ y When σ is positive, it rotates clockwise; y When it is negative, it rotates counterclockwise), and the rotation value is σ y +0.5mm (deformation compensation).

[0065] Only when there is an absolute deviation in the Z direction σ z When turning the Z direction hand wheel of the left 1, left 2, right 1, and right 2 mechanisms (σ z When σ is positive, it rotates clockwise; z When it is negative, it rotates counterclockwise), and 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 z After adjustment is in place, adjust the relative deviation.

[0067] Calculated from the main view direction, there is a relative deviation σ between hole 1 and hole 2 zxd , and it is a positive value, then the Z direction handwheel of the left 1 and left 2 adjustment mechanisms should be turned clockwise, and the rotation value is (X 左2 -X 孔1 )sin{arcsin[σ zxd / (X 孔2 -X 孔1 )]}+0.5mm(deformation compensation); at the same time, turn the X direction handwheel of the left 1 and left 2 adjustment mechanisms counterclockwise, and the rotation value is (X 左2 -X 孔1 )-cos{arcsin[σ zxd / (Xleft2-Xhole1)]}+0.5mm(deformation compensation).

[0068] Calculate from the left view direction, (see attached Figure 6 ), assuming that there is a relative deviation σ between hole 3 and hole 4 zxd, and it is a negative value, then the Z direction handwheel of the left 1 and right 1 adjustment mechanism should be turned clockwise, and the rotation value is (Y 左1 -Y 右1 )sin{arcsin[σ zxd / (Y 孔2 -Y 孔1 )]}+0.5mm(deformation compensation); at the same time, turn the Y direction hand wheel of the left / right No. 1 adjustment mechanism counterclockwise, and the rotation value is (Y 左1 -Y 右1 )-cos{arcsin[σ zxd / (Y 孔2 -Y 孔1 )]}+0.5mm(deformation compensation).

[0069] Embodiment:

[0070] Calculated from the main view direction, see attached Figure 5 , assuming that there is a relative deviation σzxd between hole 1 and hole 2, and it is a positive value, the Z-direction handwheel of the left 1 and left 2 adjustment mechanisms should be turned clockwise, and the rotation value is (1300+1200)sin(arcsin(σzxd / 1200))+0.5mm (deformation compensation); at the same time, the X-direction handwheel of the left 1 and left 2 adjustment mechanisms should be turned counterclockwise, and the rotation value is (13+1200)-cos(arcsin(σzxd / 1200))+0.5mm (deformation compensation).

[0071] Calculate from the left view direction, see attached Figure 6 , assuming that there is a relative deviation σ between hole 3 and hole 4 zxd , and it is a negative value, then the Z direction handwheel of the left 1 and right 1 adjustment mechanism should be turned clockwise, and the rotation value is (3100+1200)sin(arcsin(σ zxd / 1200))+0.5mm(deformation compensation); at the same time, turn the Y direction handwheel of the left 1 and right 1 adjustment mechanism counterclockwise, and the rotation value is (31+1200)-cos(arcsin(σ zxd / 1200))+0.5mm(deformation compensation).

Claims

1. A method for adjusting the position and posture of a transition piece of a large-scale turntable with high precision for a large aircraft, characterized in that: The following steps are involved: S1: Position the turntable transition piece and form the barrel section product with the wall plate; S2: Install the cup-cone ball head and the high-throw column joint on the barrel section product; S3: Adjust the position of the barrel product until the cup-cone ball head falls into the cup-cone seat; S4: Measure the flatness of the upper surface of the turntable transition piece. If the flatness is less than the threshold, the turntable transition piece posture adjustment is completed, otherwise enter S5: S5: Connect the adjusting mechanism to the lifting column joint to lift the barrel section product, and adjust the position of the turntable transition piece through the adjusting mechanism.

2. The method according to claim 1, characterized in that: S1: The positioning process of the turntable transition piece is as follows: Connect the turntable transition piece to the standard fixture of the pipe beam. The flatness of the fitting surface between the standard fixture of the pipe beam and the turntable transition piece is 0.015mm. Adjust the position of the standard fixture for the pipe beam until the V-shaped block under the standard fixture for the pipe beam falls into the V-shaped groove of the jig; The V-groove of the jig is arranged at the theoretical position of the turntable transition piece.

3. The method according to claim 2, characterized in that: In S1, the wall panel and the turntable transition piece are combined from top to bottom based on the upper surface of the turntable.

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

5. The method according to claim 4, characterized in that: In S3, the cup-cone ball head A is used as the positioning reference, the cup-cone ball head A is brought into contact with the cup-cone seat A, and the cup-cone ball head A is used as the rotation axis to control the barrel section product to fall naturally until the cup-cone ball head B is brought into contact with the cup-cone seat B; The cup-cone ball head A and the cup-cone seat A are clearance fit; the cup-cone seat B is an oblong hole in the X direction, and the cup-cone ball head B and the cup-cone seat B are clearance fit in the Y and Z directions; the fit clearance is 0.1mm; The X direction is the heading of the aircraft, the Y direction is the lateral direction, and the Z direction is the vertical direction.

6. The method according to claim 5, characterized in that: In S4, the process of measuring the posture of the upper surface of the turntable transition piece is as follows: measuring the three-axis coordinates of each hole on the upper surface of the turntable transition piece, comparing and obtaining the maximum and minimum values ​​of the Z-axis coordinates, and the difference between the two is used as the flatness of the upper surface of the turntable transition piece; The threshold is 2mm.

7. The method according to claim 6, characterized in that: In S5, there are four adjustment mechanisms, which are respectively denoted as left one, left two, right one, and right two; corresponding to the four high-throwing column joints; Each adjustment mechanism is provided with adjustment units in three directions: X, Y and Z. A ball socket is provided on the top of the adjustment mechanism. The position of the ball socket is adjusted by the adjustment units in three directions: X, Y and Z.

8. The method according to claim 7, characterized in that: In S5, the four adjustment mechanisms are first moved to the position directly below the joint of the high-throwing column, and then the adjustment mechanisms are controlled to rise to achieve the matching of the ball socket and the joint of the high-throwing column until the cup-cone ball head and the cup-cone seat are separated.

9. The method according to claim 8, characterized in that: In S5, the process of adjusting the position and posture of the turntable transition piece by the adjustment mechanism includes: Measure the absolute deviation between the measured coordinate value and the theoretical position value of the upper surface of the turntable transition piece; adjust the barrel section product through four adjustment mechanisms until the absolute deviation is less than the threshold.

10. The method according to claim 9, characterized in that: In S5, the process of adjusting the position and posture of the turntable transition piece by the adjustment mechanism further includes: measuring the relative deviation between the measured coordinate value and the theoretical position value of the upper surface of the turntable transition piece in the Z direction; The relative deviation is the maximum value of the Z-direction coordinate difference of each hole on the upper surface of the turntable transition piece; Determine the two holes corresponding to the maximum value of the Z-axis coordinate difference; adjust the barrel section product through four adjustment mechanisms according to the three-dimensional coordinates of the two holes until the relative deviation is less than the threshold value; The adjustment includes the adjustment of the XZ plane and the adjustment of the YZ plane.

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