Special rolling angle adjusting tool for fused body wind tunnel model and use method of special rolling angle adjusting tool

Abstract

The invention provides a rolling angle adjusting tool special for a fusion body wind tunnel model and a using method thereof. The rolling angle adjusting tool comprises a supporting rod, a side baffle, a platform, a dial indicator, a dividing head and a tailstock. A T-shaped groove is formed in the center of the platform, the dividing head and the tailstock are installed on the platform through a T-shaped block, two side plates with scales are installed on the two sides of the platform, it is guaranteed that the side baffles and the T-shaped groove are symmetrical, the number starting ends are located at the same positions of the two sides of the T-shaped groove, and a fusion body wind tunnel model is clamped to the dividing head through a supporting rod. A dial indicator with a digital meter frame is attached to the same position of the two side baffles for metering measurement and inspection; and the tailstock is used for realizing the jacking and fixing of the fusion body wind tunnel model in the measurement process.

Description

Technical Field

[0001] The present invention is applicable to the field of wind tunnel model or special-shaped component assembly, and can realize the measurement and adjustment of the radial rolling freedom of the fusion model, and realize the high-precision position requirement of the model in the assembly process. Background Art

[0002] The assembly accuracy of the wind tunnel test model has a great impact on the model wind tunnel test data. In particular, the overall contour and coaxial assembly accuracy of the model have the greatest impact on the accuracy of the test data, and ultimately affect the missile's hit accuracy and the aircraft's control accuracy. Therefore, when assembling the overall contour and coaxiality of the wind tunnel model, the tolerance of the installation angle and roll angle of each section of the contour is required to be less than or equal to 3 points, and the installation accuracy requirement is very high.

[0003] When assembling fusion and non-rotating models, it is necessary to measure the local reference points on each segment for rolling alignment, but the local reference points need to be symmetrical and accurate about the center of each segment of the model. Figure 1 ) cannot be implemented.

[0004] Common technical means require experienced fitters to make manual adjustments, touch the steps of the upstream and downstream airflows of each section to make adjustments, glue each section together and use three-coordinate inspection. If the three-coordinate inspection fails, the direction and size of the misalignment need to be marked, and the adhesive is reopened to make manual adjustments according to the three-coordinate data and repeat the above steps until the three-coordinate inspection passes. This method requires high skill levels of personnel, cannot be intuitively felt, and requires repeated three-coordinate inspections. The use of three-coordinate measuring machines for measurement has the disadvantages of expensive equipment, the need to import three-dimensional digital models of parts, cumbersome measurement process, inability to display the measurement data of the entire assembly at all times, expensive inspection costs, and high requirements for the quality of inspectors. At the same time, during the wind tunnel test, the model needs to be disassembled and assembled many times. The disassembled model cannot be inspected in time due to the site and wind tunnel equipment, which has a certain impact on the wind tunnel blowing data. Summary of the invention

[0005] The technical problem solved by the present invention is: in order to overcome the shortcomings of existing measurement tools, the present invention provides a wind tunnel model segment profile assembly detection accuracy tooling. The tooling has high measurement accuracy, low measurement cost, simple measurement process, no site restrictions, can measure the profile angle of each matching segment of any non-rolling body model, and can display measurement data at any time, thereby improving assembly accuracy and inspection accuracy.

[0006] The technical solution of the present invention is: a special roll angle adjustment tooling for a fusion wind tunnel model, comprising a support rod, a side baffle, a platform, a dial indicator, a dividing head and a tailstock;

[0007] A T-shaped groove is arranged at the center of the platform, and a dividing head and a tailstock are installed on the platform through a T-shaped block. Two side panels with scales are installed on both sides of the platform to ensure that the side baffles are symmetrical with the T-shaped groove and that the starting ends of the numbers are at the same position on both sides of the T-shaped groove. The fusion wind tunnel model is clamped to the dividing head by a support rod, and a dial indicator with a digital meter stand is attached to the same position of the two side baffles for meter measurement and inspection; the tailstock is used to realize the top and fixation of the fusion wind tunnel model during the measurement process.

[0008] Preferably, the dividing head and the tailstock are symmetrical about the axis of the T-groove of the platform.

[0009] Preferably, the support rod is connected to the fusion body wind tunnel model through the tapered hole by fasteners.

[0010] A method for adjusting the roll angle using the dedicated roll angle adjusting tool for the fusion wind tunnel model, comprising:

[0011] S1. Connect the support rod to the first section of the model through the tapered hole with fasteners, and install the remaining sections of the model in sequence through the matching sections. The last section of the model is tightened to the tailstock by the reverse centering method;

[0012] S2. Place the dial gauge base close to the side baffle to measure a certain point on one side of the first section of the model, lock the joints of the dial gauge with the pressure gauge, and record the pressure gauge value A and the position B of the dial gauge on the side baffle;

[0013] S3. Remove the dial gauge from one side baffle and place it at the same position B on the other side baffle, and observe the dial gauge pressure value. If the dial gauge pressure value at this time is consistent with the first pressure gauge value A, the outer contour of the current model is parallel to the platform and there is no roll angle; if the difference is a, the outer contour degree of the model and the platform is a / 2. At this time, the tailstock needs to be loosened and the model is adjusted by an adjustment amount of a / 2. After the adjustment is complete, continue to tighten it through the tailstock;

[0014] S4. Place the dial gauge base close to the side baffle to measure a certain point on one side of the second section model, lock the joints of the dial gauge with a pressure gauge, and record the pressure gauge value A and the position B of the dial gauge on the side baffle; repeat S3 to complete the adjustment of the second section model; after the adjustment is completed, glue the first section model and the second section model together, and adjust the third section model, and so on, until all models are adjusted and fixed.

[0015] Preferably, the matching section between two adjacent models adopts column-hole clearance matching.

[0016] A special roll angle adjustment tool for a fusion wind tunnel model, comprising a support rod, a side baffle, a platform, a laser displacement sensor, a dividing head and a tailstock;

[0017] A T-shaped groove is arranged at the center of the platform, and a dividing head and a tailstock are installed on the platform through a T-shaped block. Two side panels with scales are installed on both sides of the platform to ensure that the side baffles are symmetrical with the T-shaped groove and that the starting ends of the numbers are at the same position on both sides of the T-shaped groove. The fusion body wind tunnel model is clamped to the dividing head by a support rod, and a laser displacement sensor is used to perform measurement and inspection at the same position of the two side baffles; the tailstock is used to realize the top and fixation of the fusion body wind tunnel model during the measurement process.

[0018] Preferably, the dividing head and the tailstock are symmetrical about the axis of the T-groove of the platform.

[0019] A method for adjusting the roll angle using the dedicated roll angle adjusting tool for the fusion wind tunnel model includes:

[0020] S1. Connect the support rod to the first section of the model through the tapered hole with fasteners, and install the remaining sections of the model in sequence through the matching sections. The last section of the model is tightened to the tailstock by the reverse centering method;

[0021] S2, use the laser sensor to measure a certain point on one side of the first section of the model, and record the position B of the laser sensor on the side baffle and the measured data A;

[0022] S3, place the laser sensor at the same position B on the other side baffle to complete the same measurement as S2; if the two measurement data A are consistent, the outer contour of the model in the current measurement section is parallel to the platform and has no roll angle; if the difference is a, the outer contour degree of the model and the platform is a / 2, and the tailstock needs to be loosened at this time, and the model needs to be adjusted by an adjustment amount of a / 2. After the adjustment is complete, continue to tighten it through the tailstock;

[0023] S4, use the laser sensor to measure a point on one side of the second model, record the measured value A and the position B of the laser sensor on the side baffle; repeat S3 to complete the adjustment of the second model; after the adjustment is completed, glue the first model and the second model together, and adjust the third model, and so on, until all models are adjusted and fixed.

[0024] The beneficial effects of the present invention compared with the prior art are:

[0025] By utilizing the existing benchwork assembly platform for transformation, the measurement accuracy is high, the measurement cost is low, the measurement process is simple, there are many site restrictions, and the dependence on equipment and the addition of process benchmarks are reduced. The outer contour roll of each section of the entire model can be measured, and the measurement data can be displayed at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a commonly used platform for fitters.

[0027] Figure 2 It's a digital bezel.

[0028] Figure 3 It is a dial indicator with a digital stand.

[0029] Figure 4 This is a schematic diagram of the structure;

[0030] Figure 5 It is a laser sensor with a digital meter stand.

[0031] Among them: 1 platform; 2 side baffles; 3 dividing head; 4 support rods; 5 fusion model; 6 dial indicator with digital stand; 7 tailstock. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the embodiments.

[0033] Example 1

[0034] like Figure 1-4 As shown, a special roll angle adjustment tool for a fusion wind tunnel model includes a support rod 4, a side baffle 2, a platform 1, a dial indicator 6, a dividing head 3 and a tailstock 7;

[0035] Utilize the assembly platform used by the existing fitter, take the center T-slot of the platform as the center, and process the two sides of the platform so that the two sides of the platform are symmetrical about the center T-slot and perpendicular to the large working surface of the platform. At the same time, install side baffles 2 on both sides of the platform 1, engrave digital scales on the side baffles, fasten the digital side baffles to both sides of the platform with positioning pin screws, and assemble the two side baffle digital scale zero points at the same starting position on both sides of the platform. Install a dividing head 3 and an adjustable machine tailstock 7 at both ends of the platform, and use T-blocks to position and install the dividing head and the machine tailstock to ensure that the dividing head and the machine tailstock are symmetrical in the center of the platform. Clamp the tail end of the model on the dividing head and install each section of the model in turn, and finally tighten the model through the tailstock.

[0036] At the same time, a 49mm / 50 equal-division scale is engraved on one side of the dial indicator 6 base. The dial indicator base is used in conjunction with the side baffle, and the base slides on the digital scale of the side baffle with an accuracy of 0.02mm.

[0037] Match the baffles on both sides of the platform with the dial indicator, measure the horizontal height of the specific symmetrical points on the left and right of the model, fix the dial indicator on the base, slide the base on the baffle position on one side to adjust the pressure gauge to zero, and record the position of the base on the baffle. Pick up the base and place it on the same scale position on the other side baffle, observe the value of the dial indicator on the model, if the pressure gauge value is consistent with the previous pressure gauge value, the outer contour of the model has not rolled radially. If the values ​​are inconsistent, adjustment is required. When adjusting, first loosen the tailstock and press the gauge in place. Use the copper rod to knock on the outer contour of the model to adjust it to 1 / 2 of the difference between the first and second values, and repeat the inspection process (the tailstock needs to hold the model tightly during the inspection process) until the dial indicator values ​​are consistent at the same value of the two baffles. After the adjustment is complete, continue to tighten it through the tailstock; place the dial indicator base close to the side baffle to measure a point on one side of the second model, lock the joints of the dial indicator with a pressure gauge, and record the pressure gauge value and the position of the dial indicator on the side baffle; the above process completes the adjustment of the second model; after the adjustment is completed, fix the first model and the second model with glue, and adjust the third model, and so on, until all models are adjusted and fixed.

[0038] According to the above steps, the remaining segments of the model can be adjusted in turn, and then gluing and fixing are performed to achieve high-precision assembly quality of the model. Alternatively, the adjustment steps in the above steps can be omitted to check whether the contours between the segments of the model meet the accuracy requirements.

[0039] Example 2

[0040] A special roll angle adjustment tool for a fusion wind tunnel model, comprising a support rod, a side baffle, a platform, a laser displacement sensor, a dividing head and a tailstock;

[0041] A T-shaped groove is arranged at the center of the platform, and a dividing head and a tailstock are installed on the platform through a T-shaped block. Two side plates with scales are installed on both sides of the platform to ensure that the side baffles are symmetrical with the T-shaped groove and that the starting ends of the numbers are at the same position on both sides of the T-shaped groove. The fusion body wind tunnel model is clamped to the dividing head by a support rod, and a laser displacement sensor is used to perform measurement and inspection at the same position of the two side baffles; the tailstock is used to realize the tightening and fixing of the fusion body wind tunnel model during the measurement process; the dividing head and the tailstock are symmetrical about the axis of the T-shaped groove of the platform.

[0042] The adjustment method implemented by using the special roll angle adjustment tooling for the fusion wind tunnel model includes:

[0043] S1. Connect the support rod to the first section of the model through the tapered hole with fasteners, and install the remaining sections of the model in sequence through the matching sections. The last section of the model is tightened to the tailstock by the reverse centering method;

[0044] S2, using a laser sensor with a digital meter stand ( Figure 5, scale not shown) measuring a certain point on one side of the first section model, recording the position B of the laser sensor on the side baffle and the measured data A;

[0045] S3, place the laser sensor at the same position B on the other side baffle to complete the same measurement as S2; if the two measurement data A are consistent, the outer contour of the model in the current measurement section is parallel to the platform and has no roll angle; if the difference is a, the outer contour degree of the model and the platform is a / 2, and the tailstock needs to be loosened at this time, and the model needs to be adjusted by an adjustment amount of a / 2. After the adjustment is complete, continue to tighten it through the tailstock;

[0046] S4, use the laser sensor to measure a point on one side of the second model, record the measured value A and the position B of the laser sensor on the side baffle; repeat S3 to complete the adjustment of the second model; after the adjustment is completed, glue the first model and the second model together, and adjust the third model, and so on, until all models are adjusted and fixed.

[0047] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A special roll angle adjustment tool for a fusion wind tunnel model, characterized by: Includes support rod, side baffle, platform, dial indicator, dividing head and tailstock; A T-shaped groove is arranged at the center of the platform, and a dividing head and a tailstock are installed on the platform through a T-shaped block. Two side panels with scales are installed on both sides of the platform to ensure that the side baffles are symmetrical with the T-shaped groove and that the starting ends of the numbers are at the same position on both sides of the T-shaped groove. The fusion wind tunnel model is clamped to the dividing head by a support rod, and a dial indicator with a digital meter stand is attached to the same position of the two side baffles for meter measurement and inspection; the tailstock is used to realize the top and fixation of the fusion wind tunnel model during the measurement process.

2. The tooling according to claim 1, characterized in that: The dividing head and the tailstock are symmetrical about the axis of the T-groove of the platform.

3. The tooling according to claim 1, characterized in that: The support rod is connected with the fusion body wind tunnel model through the tapered hole by fasteners.

4. A method for adjusting the roll angle of a fusion wind tunnel model using the special roll angle adjustment tooling of claim 1, characterized in that include S1. Connect the support rod to the first section of the model through the tapered hole with fasteners, and install the remaining sections of the model in sequence through the matching sections. The last section of the model is tightened to the tailstock by the reverse centering method; S2. Place the dial gauge base close to the side baffle to measure a certain point on one side of the first section of the model, lock the joints of the dial gauge with the pressure gauge, and record the pressure gauge value A and the position B of the dial gauge on the side baffle; S3. Remove the dial gauge from one side baffle and place it at the same position B on the other side baffle, and observe the dial gauge pressure value. If the dial gauge pressure value at this time is consistent with the first pressure gauge value A, the outer contour of the current model is parallel to the platform and there is no roll angle; if the difference is a, the outer contour degree of the model and the platform is a / 2. At this time, the tailstock needs to be loosened and the model is adjusted by an adjustment amount of a / 2. After the adjustment is complete, continue to tighten it through the tailstock; S4. Place the dial gauge base close to the side baffle to measure a certain point on one side of the second section model, lock the joints of the dial gauge with a pressure gauge, and record the pressure gauge value A and the position B of the dial gauge on the side baffle; repeat S3 to complete the adjustment of the second section model; after the adjustment is completed, glue the first section model and the second section model together, and adjust the third section model, and so on, until all models are adjusted and fixed.

5. The method according to claim 4, characterized in that: The matching section between two adjacent models adopts cylindrical hole clearance matching.

6. A special roll angle adjustment tool for a fusion wind tunnel model, characterized in that: It includes support rod, side baffle, platform, laser displacement sensor, indexing head and tailstock; A T-shaped groove is arranged at the center of the platform, and a dividing head and a tailstock are installed on the platform through a T-shaped block. Two side panels with scales are installed on both sides of the platform to ensure that the side baffles are symmetrical with the T-shaped groove and that the starting ends of the numbers are at the same position on both sides of the T-shaped groove. The fusion body wind tunnel model is clamped to the dividing head by a support rod, and a laser displacement sensor is used to perform measurement and inspection at the same position of the two side baffles; the tailstock is used to realize the top and fixation of the fusion body wind tunnel model during the measurement process.

7. The tooling according to claim 6, characterized in that: The dividing head and the tailstock are symmetrical about the axis of the T-groove of the platform.

8. A method for adjusting the roll angle of a fusion wind tunnel model using the special roll angle adjustment tooling of claim 6, characterized in that include S1. Connect the support rod to the first section of the model through the tapered hole with fasteners, and install the remaining sections of the model in sequence through the matching sections. The last section of the model is tightened to the tailstock by the reverse centering method; S2, use the laser sensor to measure a certain point on one side of the first section of the model, and record the position B of the laser sensor on the side baffle and the measured data A; S3, place the laser sensor at the same position B on the other side baffle to complete the same measurement as S2; if the two measurement data A are consistent, the outer contour of the model in the current measurement section is parallel to the platform and has no roll angle; if the difference is a, the outer contour degree of the model and the platform is a / 2, and the tailstock needs to be loosened at this time, and the model needs to be adjusted by an adjustment amount of a / 2. After the adjustment is complete, continue to tighten it through the tailstock; S4, use the laser sensor to measure a point on one side of the second model, record the measured value A and the position B of the laser sensor on the side baffle; repeat S3 to complete the adjustment of the second model; after the adjustment is completed, glue the first model and the second model together, and adjust the third model, and so on, until all models are adjusted and fixed.

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