Straightening method of aluminum alloy floor beam profile for aviation

Abstract

The invention discloses a straightening method for an aluminum alloy floor beam profile for aviation, belongs to the technical field of straightening of floor beam profiles, and is used for straightening the aluminum alloy floor beam profile for aviation. Comprising the steps that a floor beam profile is hoisted to a roller conveying line, a special roller piece is installed on a shaping machine, the height of a supporting roller is adjusted, and a fixing bolt is tightened after the installation position is qualified; the floor beam profile is straightened in a roll shape; after being straightened, the floor beam profile is subjected to solution treatment by using a horizontal quenching furnace, and is immediately subjected to quenching treatment; the floor beam profile is stretched and straightened; the straightened floor beam profile is put into an aging oven for primary aging, then the temperature is increased for secondary aging, and finally the floor beam profile is air-cooled to the room temperature; measuring a plane gap and a longitudinal lateral bending gap of the floor beam profile; and sawing the straightened floor beam profile to obtain a straightened profile. Compared with the prior art, the method has the advantages that the plane gap and the lateral bending degree of the floor beam profile are reduced, the specified deviation of the outline of an ultra-long profile is achieved, and the percent of pass is increased.

Description

Technical Field

[0001] The invention discloses a straightening method for an aluminum alloy floor beam profile for aviation, and belongs to the technical field of straightening of floor beam profiles. Background Art

[0002] The application of aluminum alloys in the aviation field is mainly concentrated on the structural parts of aircraft, such as skins, frames, propellers, fuel tanks, wall panels and landing gear struts. These parts require materials with high strength, high toughness, good fatigue resistance and plasticity. In the aviation industry, commonly used aluminum alloy series include 2xxx series (such as 2024, 2026, etc.) and 7xxx series (such as 7075, 7055, etc.). Floor beam profiles used for aircraft structural parts have extremely high requirements for flatness. Tensile straightening methods are usually used to improve the flatness of profiles to ensure the quality, performance and safety of the final product. Roller straightening and tensile straightening are achieved by applying a tensile force exceeding the yield point to the profile to cause slight plastic deformation. It is suitable for some specific types of alloys and profiles of specific shapes.

[0003] Aircraft floor beams have a relatively complex structure. They were originally machined directly from medium and thick plates produced by rolling. However, floor beams produced from plates require a lot of machining time and generate a lot of scrap during the production process, resulting in low material utilization. Changing the floor beam production method to extrusion can produce complex profiles that cannot be produced by conventional rolling methods, with greater flexibility in product shape and size, and significantly improving material utilization.

[0004] Due to the alignment between the extrusion equipment and the ingot, the extrusion temperature and extrusion speed control, the cooling system, the uneven heating of the material, the mold design, the asymmetry of the profile cross-section size and other issues, the aluminum profile will be twisted, bent, wavy and other defects after being extruded out of the die hole, and the aluminum profile needs to be corrected in time. For small-scale production or special-shaped profiles, manual tools such as hammers and crowbars are sometimes used for straightening, but the floor beams for aviation use are made of 7075 alloy, which has high requirements for strength and straightness, and cannot be straightened manually, and special straightening equipment is required. Patent 1 (Patent Publication No.: CN117161146A) discloses a roller straightening process for improving the shape and size of 7150 aluminum alloy profiles for aviation. The bending of the material is gradually corrected by multiple rollers arranged in a certain arc. When the material passes through these rollers, it uses multiple repeated bends to eliminate the original curvature unevenness of the metal, thereby achieving straightness. However, for some defects of certain shapes, such as longitudinal bending, transverse bending, edge wave shape and middle wave shape, roller straightening may not be able to completely correct them. And the correction ability of the roller straightening machine is limited by its mechanical structure and adjustment range, which may cause scratches or indentations on the surface of the material, especially when processing materials with high surface quality requirements, such damage may become a problem. Patent 2 (Patent Publication No.: CN114713664A) discloses an aluminum profile straightening device and straightening method, which uses a press or similar equipment to apply pressure to the material to correct its bending or twisting. The operation process of pressure straightening is more complicated and requires experienced operators to control the pressure and position during the straightening process to ensure the straightening effect. Due to the complexity of its operation, the efficiency of pressure straightening is relatively low, which may become a bottleneck in large-scale production. During the straightening process, if the operation is improper, it may cause new defects such as bending, twisting, gnawing or correction marks on the profile.

[0005] Due to the high strength, large size, thin thickness of floor beam profiles, and high requirements for the plane gap and shape and position size control of the product, general straightening technology cannot meet the requirements for floor beam straightening. The combination of roller straightening and stretching straightening is used for the initial straightening of floor beam profiles, while the stretching straightener is used for subsequent fine straightening. The extruded profile is roller straightened, and several rollers are used to apply pressure to the profile section to make the parts that do not meet the shape and position dimensions bend back, thereby eliminating the bending on the profile section. However, roller straightening cannot eliminate the lateral bending of the profile as a whole during the extrusion process. After roller straightening, stretching straightening is required to adjust the lateral bending of the profile. Specifically, in the stretching straightening process, a longitudinal tensile force is first applied to the workpiece. When this tensile force exceeds the yield limit of the material, the material will produce plastic extension. By applying uniform tensile force to the material, the original shape defects can be corrected. Stretch straightening can improve the side bending, thus greatly improving the straightness of the profile, and can also reduce the anisotropy of the profile and reduce surface scratches during the straightening process. Compared with traditional straightening methods, the tension applied by the stretch straightening machine to the profile is smaller, which can reduce the risk of fracture during the straightening process. Therefore, the straightening technology of roller straightening and stretch straightening is of great significance for improving the profile plane gap and controlling the shape and position size. Summary of the invention

[0006] The purpose of the present invention is to provide a straightening method for aluminum alloy floor beam profiles for aviation, so as to solve the problems in the prior art that the floor beam profiles have large plane gaps and lateral bending, the outer contour exceeds the specified deviation, and the qualified rate of the floor beam profiles is low.

[0007] A straightening method for an aviation aluminum alloy floor beam profile, comprising:

[0008] S1. Lift the floor beam profile to the roller conveyor line, and install a pressing roller on the shaping machine. The shaping machine includes shaping rollers and support rollers. The shaping rollers include an upper shaping roller, a lower shaping roller A, and a lower shaping roller B. The support rollers include an upper support roller, a lower support roller, and a positioning support roller.

[0009] The shaping roller is perpendicular to the horizontal direction, the upper support roller and the upper shaping roller are perpendicular and used in coordination, the lower support roller and the lower shaping roller A and the lower shaping roller B are perpendicular and used in coordination, four pressing rollers are provided, and are fixed by four vertically arranged positioning support rollers;

[0010] The floor beam profile includes three grooves in sequence, wherein the first groove and the third groove are in the same downward direction, the second groove is in a different direction from the first groove, an extension portion is provided on both sides of the first groove and the third groove, each extension portion is provided with a corresponding horizontal short surface, and a pressing roller is provided at both ends of each extension portion;

[0011] S2. Adjust the height of the support roller, tighten the fixing bolts after the installation position is qualified, place the front side of the extruded floor beam profile on the roller conveyor line, and perform roller straightening. After roller straightening on the front side, flip the profile horizontally 180°, adjust the shaping roller position and support roller height of the shaping machine, and perform roller straightening on the back side of the floor beam profile;

[0012] S3. After roller straightening, the floor beam profile is subjected to solution treatment in a horizontal quenching furnace, and the floor beam profile after solution treatment is immediately quenched, and the quenching completion time m1 is recorded;

[0013] S4. Place the quenched floor beam profile on the conveyor roller of the stretching and straightening machine, clamp and fix the two ends of the floor beam profile, stretch and straighten it, record the unloading time of the tensile force as m2, and calculate the time m3 for the straightening process of the control profile;

[0014] S5. After the floor beam profile is unloaded from the stretching straightening machine, the straightened floor beam profile is placed in an aging furnace for insulation, the insulation temperature is between 115°C and 122°C, the insulation time is between 3 hours and 6 hours, and then the temperature is increased, the heating temperature is between 170°C and 180°C, the insulation time after heating is between 10 hours and 20 hours, and finally air-cooled to room temperature;

[0015] S6. Start the crane to transport the straightened floor beam profile to the inspection platform and lay it flat, and measure the plane gap and longitudinal lateral bending gap of the floor beam profile;

[0016] S7. Saw the straightened floor beam profile, cut and scrap the part where the floor beam profile contacts the stretch straightening machine chuck A and the stretch straightening machine chuck B, and obtain a straightened profile.

[0017] S1 includes: before roller straightening, it is necessary to adjust the distance between the upper and lower support rollers according to the curvature of the cross section of the floor beam, control the pressing amount of the roller straightening, and adjust the position of the pressing roller.

[0018] S2 includes:

[0019] The three groove surfaces of the first groove, the second groove and the third groove are marked as B, E and C respectively, the extension portion on the first groove side is marked as D, the extension portion on the third groove side is marked as F, and the end point of the floor beam profile on the first groove side is marked as A;

[0020] S2.1. Place the front of the floor beam profile on the roller conveyor line of the shaping machine. After the floor beam profile passes through the shaping machine for the first time, the floor beam profile is roller-straightened once. The upper shaping roller is used to contact the second groove, and the lower shaping roller is used to contact D and F. The pressing height is between 13mm and 19mm to trim the overall plane gap of the floor beam profile.

[0021] S2.2. Adjust the position of the shaping roller of the shaping machine, and at the same time, turn the floor beam profile horizontally by 180°, and perform secondary roller straightening on the first groove of the floor beam profile, using the upper shaping roller to contact the first groove, the lower shaping roller to contact B and C, and the pressing roller to contact the horizontal short surface of the extension, with the pressing height between 6 mm and 12 mm;

[0022] S2.3. Continue to adjust the position of the shaping roller of the shaping machine, and perform three-time roller straightening on the third groove of the floor beam profile, using the upper shaping roller to contact the third groove, using the lower shaping roller to contact B and C, and using the pressing roller to contact the horizontal short surface of the extension, with the pressing height between 6mm and 12mm.

[0023] S3 includes:

[0024] S3.1. Place the roller-straightened floor beam profile in a horizontal furnace for insulation at a temperature between 473°C and 478°C for a time between 100 minutes and 200 minutes;

[0025] S3.2. After the insulation of the floor beam profile is completed, the solid solution floor beam profile is transported into the spray chamber for quenching and cooling by a transmission motor. The quenching transmission speed is between 150mm / s and 300mm / s, and the spray water temperature is between 20℃ and 30℃.

[0026] S4 includes:

[0027] S4.1. Lift the floor beam profile with a soft sling and use a crane to smoothly lift the floor beam profile to the center of the straightening equipment. The straightening equipment is an 850T stretching machine. Place the floor beam profile on the conveying roller. Clamp the two ends of the floor beam profile with the stretching straightening machine clamp A and the stretching straightening machine clamp B, and apply a clamping force of 100 tons to fix the two ends of the floor beam profile;

[0028] S4.2. The tension straightening machine chuck A and the tension straightening machine chuck B apply the tensioning force simultaneously, so that the deformation of the floor beam profile is between 1.6% and 2.2%, and the floor beam profile is stretched and straightened.

[0029] S4 includes controlling the time m3 of the profile straightening process to be:

[0030] m3=m1-m2; m3<3 hours.

[0031] S6 includes, S6.1. Place the stretched and straightened floor beam profile on the horizontal plane of the testing platform to make the deadweight of the floor beam profile stable.

[0032] S6 includes, S6.2. Fit the head end of the longitudinal lateral bending detection position of the floor beam profile to the side elevation of the detection platform, and use a feeler gauge and a cone gauge to measure the longitudinal lateral bending gap of the floor beam profile, that is, measure the gap between the position A of the floor beam profile and the side elevation of the detection platform every 1500mm, recorded as h1.

[0033] S6 includes, S6.3. When the floor beam profile is stable in a free state, use a feeler gauge and a cone gauge to measure the plane gap on the front of the floor beam profile, that is, measure the plane gap between the floor beam profile position B and the floor beam profile position C and the ruler every 1500mm, and record them as h2 and h3 respectively.

[0034] S6 includes, S6.4. Turn the floor beam profile horizontally 180° and place it on the horizontal plane of the detection platform. When the floor beam profile is stable in a free state, use a feeler gauge and a cone gauge to measure the plane gap on the back of the floor beam profile, that is, measure the plane gap between the floor beam profile position D, the floor beam profile position E and the floor beam profile position F and the ruler every 1500mm, and record them as h4, h5, and h6 respectively.

[0035] Compared with the prior art, the present invention has the following beneficial effects: it can achieve a more efficient and more accurate straightening effect. The shaping machine can quickly and roughly straighten the material, eliminating most of the bending and shape defects. The stretching straightening machine can further correct the curvature and dimensional deviation of the material by applying tension; it can reduce material loss caused by excessive straightening. Through the coordinated use of the shaping machine and the stretching straightening machine, the straightening force and effect can be more accurately controlled, thereby protecting the material from excessive processing; it can reduce the internal stress generated by the material during the extrusion deformation and roller straightening process, and prevent the subsequent stretching and straightening profile from breaking. At the same time, the hardness and strength of the material after solid solution are significantly improved, while maintaining good plasticity, providing a good foundation for subsequent processing and aging treatment; there is no need to heat the profile during the stretching and straightening process, thereby reducing the performance impact of stretching and straightening on aging strengthening. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of straightening the floor beam profile of the present invention;

[0037] Figure 2 It is a schematic diagram of the cross-sectional structure of the floor beam profile of the present invention;

[0038] Figure 3 It is a schematic diagram of a combination of the second groove on the front side of the floor beam profile and the primary roller straightening process of the shaping roller of the present invention;

[0039] Figure 4 It is a schematic diagram of the combination of the first groove on the reverse side of the floor beam profile of the present invention and the secondary roller straightening process of the shaping roller;

[0040] Figure 5It is a schematic diagram of the combination of the third groove on the back side of the floor beam profile of the present invention and the three-roller straightening process of the shaping roller;

[0041] Figure 6 It is a side view of the floor beam profile and the shaping roller in the roller straightening process of the present invention;

[0042] Figure 7 It is a schematic diagram of the side structure of the floor beam profile and the stretching and straightening device of the present invention;

[0043] Figure 8 It is a schematic diagram of measuring the longitudinal lateral bending gap and plane gap of the front side of the floor beam profile of the present invention on the detection platform;

[0044] Fig. 9 It is a schematic diagram of measuring the plane gap on the reverse side of the floor beam profile of the present invention on the detection platform;

[0045] In the figure, 1- floor beam profile, 201-upper shaping roller, 202-upper supporting roller, 301-lower shaping roller A, 302-lower shaping roller B, 303-lower supporting roller, 401-pressing roller A, 402-positioning supporting roller A, 403-pressing roller B, 404-positioning supporting roller B, 405-pressing roller C, 406-positioning supporting roller C, 5-shaping machine, 501-movable base, 502-through hole, 503-frame, 601-transmission Conveying motor, 6-roller conveyor line, 7-roller conveyor line box, 701-conveying roller, 801-stretching straightening machine chuck A, 802-stretching straightening machine chuck B, 901-side elevation of detection platform, 902-horizontal plane of detection platform, 10-ruler, h1-longitudinal side bending gap at position A, h2-plane gap at position B, h3-plane gap at position C, h4-plane gap at position D, h5-plane gap at position E, h6-plane gap at position F. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] A straightening method for an aviation aluminum alloy floor beam profile, comprising:

[0048] S1. The floor beam profile 1 is hoisted onto the roller conveyor line, and a pressing roller is installed on the shaping machine 5. The shaping machine 5 includes a shaping roller and a support roller. The shaping roller includes an upper shaping roller 201, a lower shaping roller A301 and a lower shaping roller B302. The support roller includes an upper support roller 202, a lower support roller 303 and a positioning support roller.

[0049] The shaping roller is perpendicular to the horizontal direction, the upper support roller 202 and the upper shaping roller 201 are perpendicular and used in coordination, the lower support roller 303 and the lower shaping roller A301 and the lower shaping roller B302 are perpendicular and used in coordination, four pressing rollers are provided, and are fixed by four vertically arranged positioning support rollers;

[0050] The floor beam profile 1 includes three grooves in sequence, wherein the first groove and the third groove are in the same downward direction, the second groove is in a different direction from the first groove, and both sides of the first groove and the third groove are respectively provided with extension parts, each extension part is provided with a corresponding horizontal long surface and long surface short surface, and each two ends of each extension part are respectively provided with a pressing roller sheet;

[0051] S2. Adjust the height of the support roller, tighten the fixing bolts after the installation position is qualified, place the front of the extruded floor beam profile 1 on the roller conveyor line, and perform roller straightening. After the front roller straightening, flip the profile horizontally 180°, and adjust the shaping roller position and support roller height of the shaping machine 5, and perform roller straightening on the back of the floor beam profile 1;

[0052] S3. After roller straightening, the floor beam profile 1 is subjected to solution treatment in a horizontal quenching furnace, and the floor beam profile 1 is immediately quenched after solution treatment, and the quenching completion time m1 is recorded;

[0053] S4. Place the quenched floor beam profile 1 on the conveyor roller of the stretching and straightening machine, clamp and fix the two ends of the floor beam profile 1, stretch and straighten it, record the tensile force unloading time as m2, calculate and control the straightening process time m3;

[0054] S5. After the floor beam profile 1 is unloaded from the stretching straightening machine, the straightened floor beam profile 1 is placed in an aging furnace for insulation, the insulation temperature is between 115°C and 122°C, the insulation time is between 3 hours and 6 hours, and then the temperature is increased, the heating temperature is between 170°C and 180°C, the insulation time after heating is between 10 hours and 20 hours, and finally air-cooled to room temperature;

[0055] S6. Start the crane to transport the straightened floor beam profile 1 to the inspection platform and lay it flat, and measure the plane gap and longitudinal lateral bending gap of the floor beam profile 1;

[0056] S7. Saw the straightened floor beam profile 1, cut and scrap the part of the floor beam profile 1 that is in contact with the tensile straightening machine chuck A801 ​​and the tensile straightening machine chuck B802, and obtain a straightened profile.

[0057] S1 includes: before roller straightening, it is necessary to adjust the distance between the upper and lower support rollers 303 according to the bending degree of the cross section of the floor beam, control the pressing amount of the roller straightening, and adjust the position of the pressing roller.

[0058] S2 includes:

[0059] The three groove surfaces of the first groove, the second groove and the third groove are marked as B, E and C respectively, the extension portion on the first groove side is marked as D, the extension portion on the third groove side is marked as F, and the end point of the floor beam profile 1 on the first groove side is marked as A;

[0060] S2.1. Place the front side of the floor beam profile 1 on the roller conveyor line of the shaping machine 5. After the floor beam profile 1 passes through the shaping machine 5 for the first time, the second groove of the floor beam profile 1 is roller-straightened once. The upper shaping roller 201 is used to contact the second groove, and the lower shaping roller is used to contact D and F. The pressing height is between 13 mm and 19 mm, and the plane gap of the entire floor beam profile 1 is trimmed.

[0061] S2.2. Adjust the position of the shaping roller of the shaping machine 5, and at the same time, turn the floor beam profile 1 horizontally by 180°, perform secondary roller straightening on the first groove of the floor beam profile 1, use the upper shaping roller 201 to contact the first groove, use the lower shaping roller to contact B and C, and use the pressing roller to contact the horizontal short surface of the extension, and the pressing height is between 6 mm and 12 mm;

[0062] S2.3. Continue to adjust the position of the shaping roller of the shaping machine 5, and perform three-time roller straightening on the third groove of the floor beam profile 1, using the upper shaping roller 201 to contact the third groove, using the lower shaping roller to contact B and C, and using the pressing roller to contact the horizontal short surface of the extension part, and the pressing height is between 6mm and 12mm.

[0063] S3 includes:

[0064] S3.1. The roller straightened floor beam profile 1 is placed in a horizontal furnace for insulation at a temperature between 473°C and 478°C for a time between 100 minutes and 200 minutes;

[0065] S3.2. After the insulation of the floor beam profile 1 is completed, the solution-solutionized floor beam profile 1 is conveyed into the spray chamber for quenching and cooling by a conveying motor. The quenching transmission speed is between 150 mm / s and 300 mm / s, and the spray water temperature is between 20°C and 30°C.

[0066] S4 includes:

[0067] S4.1. Lift the floor beam profile 1 with a soft sling, and use a crane to hoist the floor beam profile 1 into the center of the straightening equipment. The straightening equipment is an 850T stretching machine. Place the floor beam profile 1 on the conveying roller. Clamp the two ends of the floor beam profile 1 with the stretching straightening machine chuck A801 ​​and the stretching straightening machine chuck B802, and apply a clamping force of 100 tons to clamp the two ends of the floor beam profile 1.

[0068] S4.2. The tensioning and straightening machine chuck A801 ​​and the tensioning and straightening machine chuck B802 simultaneously apply a tensile force, so that the deformation of the floor beam profile 1 is between 1.6% and 2.2%, and the floor beam profile 1 is stretched and straightened.

[0069] S4 includes controlling the time m3 of the profile straightening process to be:

[0070] m3=m1-m2; m3<3 hours.

[0071] S6 includes, S6.1. placing the stretched and straightened floor beam profile 1 on a horizontal plane of a testing platform to stabilize the deadweight of the floor beam profile 1.

[0072] S6 includes, S6.2. Fit the head end of the longitudinal lateral bending detection position of the floor beam profile 1 to the side elevation of the detection platform, and use a feeler gauge and a cone gauge to measure the longitudinal lateral bending gap of the floor beam profile 1, that is, measure the gap between the position of the floor beam profile A and the side elevation of the detection platform every 1500mm, recorded as h1.

[0073] S6 includes, S6.3. When the floor beam profile 1 is in a stable free state, use a feeler gauge and a cone gauge to measure the plane gap on the front side of the floor beam profile 1, that is, measure the plane gap between the floor beam profile 1B position and the floor beam profile 1C position and the ruler every 1500mm, and record them as h2 and h3 respectively.

[0074] S6 includes, S6.4. Flip the floor beam profile 1 horizontally 180° and place it on the horizontal plane of the detection platform. When the floor beam profile 1 is stable in a free state, use a feeler gauge and a cone gauge to measure the plane gap on the back side of the floor beam profile 1, that is, measure the plane gap between the floor beam profile 1D position, the floor beam profile 1E position and the floor beam profile 1F position and the ruler every 1500mm, and record them as h4, h5, and h6 respectively.

[0075] In Embodiment 1 of the present invention, a straightening method for an aviation aluminum alloy floor beam profile is provided, and the specific steps are as follows:

[0076] S1. Preparation: lift the floor beam profile 1 onto the roller conveyor line 6, install the special roller for the floor beam profile on the shaping machine, and adjust the height of the upper support roller 202, the lower support roller 303, the positioning support roller A402, the positioning support roller B404 and the positioning support roller C406. After the installation position is qualified, tighten the fixing bolts so that the floor beam profile 1 can pass smoothly in the subsequent roller straightening process.

[0077] S2. Roller straightening: Place the front side of the extruded floor beam profile 1 on the roller conveyor line 6, and perform roller straightening on the front side of the floor beam profile. After roller straightening, flip the floor beam profile horizontally 180°, adjust the shaping roller position and support roller height of the shaping machine, and perform roller straightening on the back side of the floor beam profile. The specific steps are as follows:

[0078] S2.1. Place the front of the floor beam profile on the roller conveyor line 6 of the shaping machine. After the floor beam profile passes through the shaping machine for the first time, the second groove of the floor beam profile is straightened by a roller, and the pressing height is 15mm to trim the plane gap of the entire floor beam profile;

[0079] S2.2. Adjust the position of the shaping roller of the shaping machine, flip the floor beam profile horizontally 180°, and perform secondary roller straightening on the first groove of the floor beam profile, with a pressing height of 10 mm;

[0080] S2.3. Continue to adjust the position of the shaping roller of the shaping machine, and perform three roller straightening operations on the third groove of the floor beam profile, with the pressing height being 10 mm.

[0081] S3. Solution quenching: After solution quenching, the floor beam profile 1 is immediately quenched, and the quenching completion time m1 is recorded. The specific steps are as follows:

[0082] S3.1. Place the roller-straightened floor beam profile into a horizontal furnace at a temperature of 475°C and keep the floor beam profile warm for 150 minutes after reaching the temperature;

[0083] S3.2. After the insulation of the floor beam profile is completed, the solution-solutionized floor beam profile is transported into the spray chamber for quenching and cooling by a transmission motor. The quenching transmission speed of the floor beam profile is 180 mm / s, and the spray water temperature is 25°C.

[0084] S4. Straightening of floor beam profiles: Place the quenched floor beam profiles on the conveying roller 701 of the stretching and straightening machine, clamp and fix the two ends of the floor beam profiles, and perform stretching and straightening. Record the unloading time of the tensile force as m2, and control the straightening process time of the profiles as m3 = m1-m2 = 2.5h. The specific steps are as follows:

[0085] S4.1. Lift the floor beam profile with a soft sling and use a crane to smoothly lift the floor beam profile into the center of the straightening equipment (850T stretching machine) so that the floor beam profile is located on the conveying roller 701. After clamping the two ends of the floor beam profile with the stretching straightening machine chuck A801 ​​and the stretching straightening machine chuck B802, apply a clamping force of 100 tons to clamp the two ends of the floor beam profile;

[0086] S4.2. The tension straightening machine chuck A801 ​​and the tension straightening machine chuck B802 simultaneously apply a certain tension force to make the deformation of the floor beam profile reach 1.8%, and the floor beam profile is stretched and straightened.

[0087] S5. Artificial aging: After unloading the floor beam profile 1 from the stretching straightening machine, put the straightened floor beam profile into an aging furnace, keep it at 119°C for 5 hours, heat it to 175°C for 15 hours, and then air-cool it to room temperature.

[0088] S6. Straightness measurement: Start the crane to transport the straightened floor beam profile to the testing platform and place it flat to prevent abnormal deformation. Measure the plane gap and longitudinal lateral bending gap of the floor beam profile. The specific steps are as follows:

[0089] S6.1. Place the straightened floor beam profile on the horizontal plane 902 of the testing platform to stabilize the deadweight of the floor beam profile;

[0090] S6.2. Fit the head end of the longitudinal lateral bending detection position of the floor beam profile to the side elevation 901 of the detection platform, and use a feeler gauge and a cone gauge to measure the gap h1 between the position A of the floor beam profile and the side elevation 901 of the detection platform every 1500mm, which is the longitudinal lateral bending gap of the floor beam;

[0091] S6.3. When the floor beam profile is in a stable free state, use a feeler gauge and a taper gauge to measure the plane gap between the floor beam profile at position B and position C and the ruler 10 at intervals of 1500 mm, and record them as h2 and h3, which are the plane gaps on the front of the floor beam profile;

[0092] S6.4. Turn the floor beam profile horizontally 180° and place it on the horizontal plane 902 of the testing platform. When the floor beam profile is stable in a free state, use a feeler gauge and a taper gauge to measure the plane gap between the floor beam profile at positions D, E and F and the ruler 10 every 1500mm and record them as h4, h5 and h6 respectively, which are the plane gaps on the back side of the floor beam profile.

[0093] S7. Cutting floor beam profiles: sawing the straightened floor beam profiles, cutting and scrapping the parts of the floor beam profiles that are in contact with the stretch straightening machine chuck A801 ​​and the stretch straightening machine chuck B802, and obtaining straightened floor beam profiles.

[0094] Embodiment 2 of the present invention is used for comparison with Embodiment 1, and is a method for straightening an aviation aluminum alloy floor beam profile, and the specific steps thereof are as follows:

[0095] S1. Preparation: lift the floor beam profile 1 onto the roller conveyor line 6, install the rollers dedicated to the floor beam profile on the shaping machine, and adjust the heights of the upper support roller 202, the lower support roller 303, the positioning support roller A402, the positioning support roller B404 and the positioning support roller C406. After the installation position is qualified, tighten the fixing bolts so that the floor beam profile 1 can pass smoothly in the subsequent roller straightening process.

[0096] S2. Roller straightening: Place the front side of the extruded floor beam profile 1 on the roller conveyor line 6, and perform roller straightening on the front side of the floor beam profile. The specific steps are as follows:

[0097] S2.1. Place the front of the floor beam profile on the roller conveyor line 6 of the shaping machine. After the floor beam profile passes through the shaping machine for the first time, the second groove of the floor beam is roller-straightened once, with a downward pressing height of 16 mm, and the overall plane gap of the floor beam profile is trimmed.

[0098] S3. Solution quenching: After solution quenching, the floor beam profile 1 is immediately quenched, and the quenching completion time m1 is recorded. The specific steps are as follows:

[0099] S3.1. Place the roller-straightened floor beam profile into a horizontal furnace at 476°C and keep the temperature for 180 minutes after the floor beam profile reaches the temperature;

[0100] S3.2. After the insulation of the floor beam profile is completed, the solution-solutionized floor beam profile is transported into the spray chamber for quenching and cooling by a transmission motor. The quenching transmission speed of the floor beam profile is 200 mm / s, and the spray water temperature is 26°C.

[0101] S4. Straightening of floor beam profiles: Place the quenched floor beam profiles on the conveying roller 701 of the stretching and straightening machine, clamp and fix the two ends of the floor beam profiles, and perform stretching and straightening. Record the unloading time of the tensile force as m2, and control the time taken for the straightening process of the floor beam profiles to be m3=m1-m2=2.3h. The specific steps are as follows:

[0102] S4.1. Lift the floor beam profile with a soft sling and use a crane to smoothly lift the floor beam profile into the center of the straightening equipment (850T stretching machine) so that the floor beam profile is located on the conveying roller 701. After clamping the two ends of the floor beam profile with the stretching straightening machine chuck A801 ​​and the stretching straightening machine chuck B802, apply a clamping force of 100 tons to clamp the two ends of the floor beam profile;

[0103] S4.2. The tension straightening machine chuck A801 ​​and the tension straightening machine chuck B802 simultaneously apply a certain tension force to make the deformation of the floor beam profile reach 1.9%, and the floor beam profile is stretched and straightened.

[0104] S5. Artificial aging: After unloading the floor beam profile 1 from the stretching straightening machine, put the straightened floor beam profile into the aging furnace, keep it at 120℃ for 4 hours, then increase the temperature to 175℃ and keep it at 15 hours, and then air cool it to room temperature.

[0105] S6. Straightness measurement: Start the crane to transport the straightened floor beam profile to the testing platform and place it flat to prevent abnormal deformation. Measure the plane gap and longitudinal lateral bending gap of the floor beam profile. The specific steps are as follows:

[0106] S6.1. Place the straightened floor beam profile on the horizontal plane 902 of the testing platform to stabilize the deadweight of the floor beam profile;

[0107] S6.2. Fit the head end of the longitudinal lateral bending detection position of the floor beam profile to the side elevation 901 of the detection platform, and use a feeler gauge and a cone gauge to measure the gap h1 between the position A of the floor beam profile and the side elevation 901 of the detection platform every 1500mm, which is the longitudinal lateral bending gap of the floor beam profile;

[0108] S6.3. When the floor beam profile is in a stable free state, use a feeler gauge and a taper gauge to measure the plane gap between the floor beam profile at position B and position C and the ruler 10 at intervals of 1500 mm, and record them as h2 and h3, which are the plane gaps on the front of the floor beam profile;

[0109] S6.4. Turn the floor beam profile horizontally 180° and place it on the horizontal plane 902 of the testing platform. When the floor beam profile is stable in a free state, use a feeler gauge and a taper gauge to measure the plane gap between the floor beam profile at positions D, E and F and the ruler 10 every 1500mm and record them as h4, h5 and h6 respectively, which are the plane gaps on the reverse side of the floor beam.

[0110] S7. Cutting floor beam profiles: sawing the straightened floor beam profiles, cutting and scrapping the parts of the floor beam profiles that are in contact with the stretch straightening machine chuck A801 ​​and the stretch straightening machine chuck B802, and obtaining straightened floor beam profiles.

[0111] In Embodiment 3 of the present invention, a straightening method for an aviation aluminum alloy floor beam profile is provided, and the specific steps are as follows:

[0112] S1. Preparation: lift the floor beam profile 1 onto the roller conveyor line 6, install the rollers dedicated to the floor beam profile on the shaping machine, and adjust the heights of the upper support roller 202, the lower support roller 303, the positioning support roller A402, the positioning support roller B404 and the positioning support roller C406. After the installation position is qualified, tighten the fixing bolts so that the floor beam profile 1 can pass smoothly in the subsequent roller straightening process.

[0113] S2. Roller straightening: Place the front side of the extruded floor beam profile 1 on the roller conveyor line 6, and perform roller straightening on the front side of the floor beam profile. After roller straightening, flip the floor beam profile horizontally 180°, adjust the shaping roller position and support roller height of the shaping machine, and perform roller straightening on the back side of the floor beam profile. The specific steps are as follows:

[0114] S2.1. Place the front of the floor beam profile on the roller conveyor line 6 of the shaping machine. After the floor beam profile passes through the shaping machine for the first time, the second groove of the floor beam profile is straightened by a roller, and the pressing height is 17mm to trim the plane gap of the entire floor beam profile;

[0115] S2.2. Adjust the position of the shaping roller of the shaping machine, flip the floor beam profile horizontally 180°, and perform secondary roller straightening on the first groove of the floor beam profile, with a pressing height of 10 mm;

[0116] S2.3. Continue to adjust the position of the shaping roller of the shaping machine, and perform three roller straightening operations on the third groove of the floor beam profile, with the pressing height being 11 mm.

[0117] S3. Solution quenching: After solution quenching, the floor beam profile 1 is immediately quenched, and the quenching completion time m1 is recorded. The specific steps are as follows:

[0118] S3.1. Place the roller-straightened floor beam profile into a horizontal furnace at a temperature of 473-478°C. After the floor beam profile reaches the temperature, keep it warm for 150 minutes.

[0119] S3.2. After the insulation of the floor beam profile is completed, the solution-solutionized floor beam profile is transported into the spray chamber for quenching and cooling by a transmission motor. The quenching transmission speed of the floor beam profile is 250 mm / s, and the spray water temperature is 27°C.

[0120] S4. Straightening of floor beam profiles: Place the quenched floor beam profiles on the conveying roller 701 of the stretching and straightening machine, clamp and fix the two ends of the floor beam profiles, and perform stretching and straightening. Record the unloading time of the tensile force as m2, and control the straightening process of the floor beam profiles to take m3 = m1-m2 = 1.8h. The specific steps are as follows:

[0121] S4.1. Lift the floor beam profile with a soft sling and use a crane to smoothly lift the profile into the center of the straightening equipment (850T stretching machine) so that the floor beam profile is located on the conveying roller 701. After clamping the two ends of the floor beam profile with the stretching straightening machine chuck A801 ​​and the stretching straightening machine chuck B802, apply a clamping force of 100 tons to clamp the two ends of the floor beam profile;

[0122] S4.2. The tension straightening machine chuck A801 ​​and the tension straightening machine chuck B802 simultaneously apply a certain tension force to make the deformation of the floor beam profile reach 2.1%, and the floor beam profile is stretched and straightened.

[0123] S5. Artificial aging: After unloading the floor beam profile 1 from the stretching straightening machine, put the straightened floor beam profile into the aging furnace, keep it at 121°C for 4 hours, then increase the temperature to 176°C and keep it for 150 hours, and then air-cool it to room temperature.

[0124] S6. Straightness measurement: Start the crane to transport the straightened floor beam profile to the testing platform and place it flat to prevent abnormal deformation. Measure the plane gap and longitudinal lateral bending gap of the floor beam profile. The specific steps are as follows:

[0125] S6.1. Place the straightened floor beam profile on the horizontal plane 902 of the testing platform to stabilize the deadweight of the floor beam profile;

[0126] S6.2. Fit the head end of the longitudinal lateral bending detection position of the floor beam profile to the side elevation 901 of the detection platform, and use a feeler gauge and a cone gauge to measure the gap h1 between the position A of the floor beam profile and the side elevation 901 of the detection platform every 1500mm, which is the longitudinal lateral bending gap of the floor beam profile;

[0127] S6.3. When the floor beam profile is in a stable free state, use a feeler gauge and a taper gauge to measure the plane gap between the floor beam profile at position B and position C and the ruler 10 at intervals of 1500 mm, and record them as h2 and h3, which are the plane gaps on the front of the floor beam profile;

[0128] S6.4. Turn the floor beam profile horizontally 180° and place it on the horizontal plane 902 of the testing platform. When the floor beam profile is stable in a free state, use a feeler gauge and a taper gauge to measure the plane gap between the floor beam profile at positions D, E and F and the ruler 10 every 1500mm and record them as h4, h5 and h6 respectively, which are the plane gaps on the back side of the floor beam profile.

[0129] S7. Cutting floor beam profiles: sawing the straightened floor beam profiles, cutting and scrapping the parts of the floor beam profiles that are in contact with the stretch straightening machine chuck A801 ​​and the stretch straightening machine chuck B802, and obtaining straightened floor beam profiles.

[0130] Embodiment 4 of the present invention is used for comparison with Embodiment 3, and is a method for straightening an aviation aluminum alloy floor beam profile, and the specific steps thereof are as follows:

[0131] S1. Preparation: lift the floor beam profile 1 onto the roller conveyor line 6, install the rollers dedicated to the floor beam profile on the shaping machine, and adjust the heights of the upper support roller 202, the lower support roller 303, the positioning support roller A402, the positioning support roller B404 and the positioning support roller C406. After the installation position is qualified, tighten the fixing bolts so that the floor beam profile 1 can pass smoothly in the subsequent roller straightening process.

[0132] S2. Roller straightening: Place the front side of the extruded floor beam profile 1 on the roller conveyor line 6, and perform roller straightening on the front side of the floor beam profile. After roller straightening, flip the floor beam profile horizontally 180°, adjust the shaping roller position and support roller height of the shaping machine, and perform roller straightening on the back side of the floor beam profile. The specific steps are as follows:

[0133] S2.1. Place the front of the floor beam profile on the roller conveyor line 6 of the shaping machine. After the floor beam profile passes through the shaping machine for the first time, the second groove of the floor beam profile is straightened by a roller, and the pressing height is 17mm to trim the plane gap of the entire floor beam profile;

[0134] S2.2. Adjust the position of the shaping roller of the shaping machine, flip the floor beam profile horizontally 180°, and perform secondary roller straightening on the first groove of the floor beam profile, with a pressing height of 9mm;

[0135] S2.3. Continue to adjust the position of the shaping roller of the shaping machine, and perform three roller straightening operations on the third groove of the floor beam profile, with the pressing height being 9mm.

[0136] S3. Solution quenching: After solution quenching, the floor beam profile 1 is immediately quenched, and the quenching completion time m1 is recorded. The specific steps are as follows:

[0137] S3.1. Place the roller-straightened floor beam profile into a horizontal furnace at a temperature of 474°C and keep the floor beam profile warm for 180 minutes after reaching the temperature;

[0138] S3.2. After the insulation of the floor beam profile is completed, the solution-solutionized floor beam profile is transported into the spray chamber for quenching and cooling by a transmission motor. The quenching transmission speed of the floor beam profile is 190 mm / s, and the spray water temperature is 24°C.

[0139] S5. Artificial aging: After unloading the floor beam profile 1 from the stretching straightening machine, put the straightened floor beam profile into the aging furnace, keep it at 119°C for 6 hours, then increase the temperature to 175°C and keep it at this temperature for 15 hours, and then air-cool it to room temperature.

[0140] S6. Straightness measurement: Start the crane to transport the straightened floor beam profile to the testing platform and place it flat to prevent abnormal deformation. Measure the plane gap and longitudinal lateral bending gap of the floor beam profile. The specific steps are as follows:

[0141] S6.1. Place the straightened floor beam profile on the horizontal plane 902 of the testing platform to stabilize the profile by its own weight;

[0142] S6.2. Fit the head end of the longitudinal lateral bending detection position of the floor beam profile to the side elevation 901 of the detection platform, and use a feeler gauge and a cone gauge to measure the gap h1 between the position A of the floor beam profile and the side elevation 901 of the detection platform every 1500mm, which is the longitudinal lateral bending gap of the floor beam profile;

[0143] S6.3. When the floor beam profile is in a stable free state, use a feeler gauge and a taper gauge to measure the plane gap between the floor beam profile at position B and position C and the ruler 10 at intervals of 1500 mm, and record them as h2 and h3, which are the plane gaps on the front of the floor beam profile;

[0144] S6.4. Turn the floor beam profile horizontally 180° and place it on the horizontal plane 902 of the testing platform. When the floor beam profile is stable in a free state, use a feeler gauge and a taper gauge to measure the plane gap between the floor beam profile at positions D, E and F and the ruler 10 every 1500mm and record them as h4, h5 and h6 respectively, which are the plane gaps on the back side of the floor beam profile.

[0145] S7. Cutting floor beam profiles: sawing the straightened floor beam profiles, cutting and scrapping the parts of the floor beam profiles that are in contact with the stretch straightening machine chuck A801 ​​and the stretch straightening machine chuck B802, and obtaining straightened floor beam profiles.

[0146] The straightened floor beam profiles produced in Examples 1 to 4 are as follows: Figure 8 , Fig. 9 The straightness is measured in the manner shown. According to the technical specifications, the maximum lateral bending clearance of the floor beam profile over the entire length is required to be less than 2.0mm, and the maximum plane clearance is less than 1.5mm. That is, the longitudinal lateral bending clearance h1 at position A is required to be less than 2.0mm, and the plane clearance at positions B, C, D, E, and F is required to be less than 1.5mm.

[0147] The deviations of the longitudinal lateral bending gap and the plane gap of the floor beam profile after straightening in Example 1 are as follows:

[0148]

[0149] The deviations of the longitudinal lateral bending gap and the plane gap of the floor beam profile after straightening in Example 2 are as follows:

[0150]

[0151]

[0152] The deviations of the longitudinal lateral bending gap and the plane gap of the floor beam profile after straightening in Example 3 are as follows:

[0153]

[0154] Example 4 The deviations of the longitudinal lateral bending gap and the plane gap of the floor beam profile after straightening are as follows:

[0155]

[0156]

[0157] The flatness test results of Examples 1-4 are shown in the following table:

[0158]

[0159] By comparing Example 2 with Example 1, it can be seen that the front and back sides of the floor beam profile need to be roller-straightened respectively, otherwise the maximum plane gap of the floor beam profile is likely to exceed the specified range. By comparing Example 4 with Example 3, it can be seen that the floor beam profile needs to be straightened and shaped after roller straightening, and the elongation rate of the floor beam profile during straightening is 1.6-2.2%, otherwise the longitudinal side bending gap is likely to exceed the specified range. Referring to the straightening methods of Examples 1 and 3 of the present invention, the dimensional deviation of large-sized, thin-walled and thick profiles such as floor beams can be within the standard range.

[0160] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features may be replaced by equivalents, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A straightening method for aviation aluminum alloy floor beam profiles, It is characterized in that include: S1. Lift the floor beam profile to the roller conveyor line, and install a pressing roller on the shaping machine. The shaping machine includes shaping rollers and support rollers. The shaping rollers include an upper shaping roller, a lower shaping roller A, and a lower shaping roller B. The support rollers include an upper support roller, a lower support roller, and a positioning support roller. The shaping roller is perpendicular to the horizontal direction, the upper support roller and the upper shaping roller are perpendicular and used in coordination, the lower support roller and the lower shaping roller A and the lower shaping roller B are perpendicular and used in coordination, four pressing rollers are provided, and are fixed by four vertically arranged positioning support rollers; The floor beam profile includes three grooves in sequence, wherein the first groove and the third groove are in the same downward direction, the second groove is in a different direction from the first groove, and both sides of the first groove and the third groove are respectively provided with extension parts, each extension part is provided with a corresponding horizontal long surface and long surface short surface, and both ends of each extension part are respectively provided with a pressing roller sheet; S2. Adjust the height of the support roller, tighten the fixing bolts after the installation position is qualified, place the front side of the extruded floor beam profile on the roller conveyor line, and perform roller straightening. After roller straightening on the front side, flip the profile horizontally 180°, adjust the shaping roller position and support roller height of the shaping machine, and perform roller straightening on the back side of the floor beam profile; S3. After roller straightening, the floor beam profile is subjected to solution treatment in a horizontal quenching furnace, and the floor beam profile after solution treatment is immediately quenched, and the quenching completion time m1 is recorded; S4. Place the quenched floor beam profile on the conveyor roller of the stretching and straightening machine, clamp and fix the two ends of the floor beam profile, stretch and straighten it, record the unloading time of the tensile force as m2, and calculate the time m3 for the straightening process of the control profile; S5. After the floor beam profile is unloaded from the stretching straightening machine, the straightened floor beam profile is placed in an aging furnace for insulation, the insulation temperature is between 115°C and 122°C, the insulation time is between 3 hours and 6 hours, and then the temperature is increased, the heating temperature is between 170°C and 180°C, the insulation time after heating is between 10 hours and 20 hours, and finally air-cooled to room temperature; S6. Start the crane to transport the straightened floor beam profile to the inspection platform and lay it flat, and measure the plane gap and longitudinal lateral bending gap of the floor beam profile; S7. Saw the straightened floor beam profile, cut and scrap the part where the floor beam profile contacts the stretch straightening machine chuck A and the stretch straightening machine chuck B, and obtain a straightened profile.

2. A method for straightening an aviation aluminum alloy floor beam profile according to claim 1, It is characterized in that S1 includes: before roller straightening, it is necessary to adjust the distance between the upper and lower support rollers according to the curvature of the cross section of the floor beam, control the pressing amount of the roller straightening, and adjust the position of the pressing roller.

3. A method for straightening an aviation aluminum alloy floor beam profile according to claim 2, It is characterized in that S2 include: The three groove surfaces of the first groove, the second groove and the third groove are marked as B, E and C respectively, the extension portion on the first groove side is marked as D, the extension portion on the third groove side is marked as F, and the end point of the floor beam profile on the first groove side is marked as A; S2.

1. Place the front of the floor beam profile on the roller conveyor line of the shaping machine. After the floor beam profile passes through the shaping machine for the first time, the floor beam profile is roller-straightened once. The upper shaping roller is used to contact the second groove, and the lower shaping roller is used to contact D and F. The pressing height is between 13mm and 19mm to trim the overall plane gap of the floor beam profile. S2.

2. Adjust the position of the shaping roller of the shaping machine, and at the same time, turn the floor beam profile horizontally by 180°, and perform secondary roller straightening on the first groove of the floor beam profile, using the upper shaping roller to contact the first groove, the lower shaping roller to contact B and C, and the pressing roller to contact the horizontal short surface of the extension, with the pressing height between 6 mm and 12 mm; S2.

3. Continue to adjust the position of the shaping roller of the shaping machine, and perform three-time roller straightening on the third groove of the floor beam profile, using the upper shaping roller to contact the third groove, using the lower shaping roller to contact B and C, and using the pressing roller to contact the horizontal short surface of the extension, with the pressing height between 6mm and 12mm.

4. A method for straightening an aviation aluminum alloy floor beam profile according to claim 3, It is characterized in that S3 include: S3.

1. Place the roller-straightened floor beam profile in a horizontal furnace for insulation at a temperature between 473°C and 478°C for a time between 100 minutes and 200 minutes; S3.

2. After the insulation of the floor beam profile is completed, the solid solution floor beam profile is transported into the spray chamber for quenching and cooling by a transmission motor. The quenching transmission speed is between 150mm / s and 300mm / s, and the spray water temperature is between 20℃ and 30℃.

5. A method for straightening an aviation aluminum alloy floor beam profile according to claim 4, It is characterized in that S4 include: S4.

1. Lift the floor beam profile with a soft sling and use a crane to smoothly lift the floor beam profile to the center of the straightening equipment. The straightening equipment is an 850T stretching machine. Place the floor beam profile on the conveying roller. Clamp the two ends of the floor beam profile with the stretching straightening machine clamp A and the stretching straightening machine clamp B, and apply a clamping force of 100 tons to fix the two ends of the floor beam profile; S4.

2. The tension straightening machine chuck A and the tension straightening machine chuck B apply the tensioning force simultaneously, so that the deformation of the floor beam profile is between 1.6% and 2.2%, and the floor beam profile is stretched and straightened.

6. A method for straightening an aviation aluminum alloy floor beam profile according to claim 5, It is characterized in that S4 includes controlling the time m3 of the profile straightening process to be: m3=m1-m2; m3<3 hours.

7. A method for straightening an aviation aluminum alloy floor beam profile according to claim 6, It is characterized in that S6 includes, S6.

1. Place the stretched and straightened floor beam profile on the horizontal plane of the testing platform to make the deadweight of the floor beam profile stable.

8. A method for straightening an aviation aluminum alloy floor beam profile according to claim 7, It is characterized in that S6 includes, S6.

2. Fit the head end of the longitudinal lateral bending detection position of the floor beam profile to the side elevation of the detection platform, and use a feeler gauge and a cone gauge to measure the longitudinal lateral bending gap of the floor beam profile, that is, measure the gap between the position A of the floor beam profile and the side elevation of the detection platform every 1500mm, recorded as h1.

9. A method for straightening an aviation aluminum alloy floor beam profile according to claim 8, It is characterized in that S6 includes, S6.

3. When the floor beam profile is stable in a free state, use a feeler gauge and a cone gauge to measure the plane gap on the front of the floor beam profile, that is, measure the plane gap between the floor beam profile position B and the floor beam profile position C and the ruler every 1500mm, and record them as h2 and h3 respectively.

10. A method for straightening an aviation aluminum alloy floor beam profile according to claim 9, It is characterized in that S6 includes, S6.

4. Turn the floor beam profile horizontally 180° and place it on the horizontal plane of the detection platform. When the floor beam profile is stable in a free state, use a feeler gauge and a cone gauge to measure the plane gap on the back of the floor beam profile, that is, measure the plane gap between the floor beam profile position D, the floor beam profile position E and the floor beam profile position F and the ruler every 1500mm, and record them as h4, h5, and h6 respectively.

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