Forming device and method for reinforcing rib parts of aircraft fuel tank

Abstract

The invention provides an aircraft fuel tank reinforcing rib part forming device and method.The device comprises a forming box, a forming cavity and a containing cavity, the forming cavity is used for forming reinforcing ribs, and the containing cavity is used for containing raw material rods; the induction heater is arranged on one side of the forming box, and the induction heater is used for heating the raw material rod; the extrusion device is located above the forming box, the extrusion device is movably connected with the forming box, and the extrusion device is used for extruding the raw material rod until the raw material rod is formed into a reinforcing rib in the forming cavity; the control mechanism is used for regulating and controlling the extrusion pressure and the extrusion speed of the extrusion device and the power of the induction heater so as to ensure the forming quality of the reinforcing rib; the forming quality of the reinforcing rib can be guaranteed by dynamically regulating and controlling the extension pressure and the extension speed of the electric telescopic rod and the power of the induction heater.

Description

Technical Field

[0001] The present application belongs to the technical field of parts forming, and specifically relates to a forming device and method for aircraft fuel tank reinforcement rib parts. Background Art

[0002] like Figure 4 As shown, the rib parts 18 in the relative technology are generally welded in pairs on the side wall of the aircraft fuel tank to tighten the aircraft fuel tank and strengthen the rigidity of the fuel tank. The raw material of the part is a metal bar, and the overall profile is approximately semicircular with a large curvature.

[0003] The reinforcing rib part 18 has a large curvature, and during the press forming process, it is easy to exceed the tensile strength of the material and cause damage to the part. At the same time, it will also produce a large rebound deformation, resulting in the part forming quality not meeting the standard or even being scrapped. Therefore, the present invention proposes a forming device and a forming method for aircraft fuel tank reinforcing rib parts. Summary of the invention

[0004] Purpose of the invention: To solve the outstanding problems that during the press forming process, the tensile strength of the material is easily exceeded, causing damage to the parts, and large rebound deformation will also occur, resulting in substandard forming quality of the parts or even scrapping.

[0005] In a first aspect, the present application provides a forming device for aircraft fuel tank reinforcement rib parts, the device comprising:

[0006] A forming box, comprising a forming cavity and a placing cavity, wherein the forming cavity is communicated with the placing cavity, the forming cavity is used for forming reinforcing ribs, and the placing cavity is used for placing raw material bars;

[0007] An induction heater is arranged on one side of the forming box, and the induction heater is used to heat the raw material rod;

[0008] An extrusion device is located above the forming box, the extrusion device is movably connected to the forming box, and the extrusion device is used to extrude the raw material rod until the raw material rod is formed into a reinforcing rib in the forming cavity;

[0009] The control mechanism is used to adjust the extrusion pressure and extrusion speed of the extrusion device and the power of the induction heater to ensure the forming quality of the reinforcing ribs.

[0010] Preferably, the extrusion device comprises:

[0011] A limiting column, one end of which is connected to the forming box;

[0012] A top plate connected to the other end of the limiting column;

[0013] An electric telescopic rod, one end of which is connected to the top plate;

[0014] A sliding plate, both ends of which are connected to the limiting posts, the sliding plate being able to slide along the limiting posts, and the middle portion of the upper surface of the sliding plate being connected to the other end of the electric telescopic rod;

[0015] A fixed plate, one end of which is connected to the middle portion of the lower surface of the sliding plate;

[0016] A semicircular plate is connected to the other end of the fixed plate; wherein, driven by the electric telescopic rod, the semicircular plate can move downward to squeeze the raw material rod until the raw material rod is formed into a reinforcing rib part in the forming cavity.

[0017] Preferably, the molding box further has a cutting groove; the device further comprises:

[0018] A cutter is connected to the sliding plate; wherein, driven by the electric telescopic rod, the cutter can move downward to cut off the raw material rod and enter the cutting groove.

[0019] Preferably, the control mechanism comprises:

[0020] A control module is electrically connected to the electric telescopic rod and the induction heater; the control module is used to adjust the extension pressure and extension speed of the electric telescopic rod and the power of the induction heater to ensure the forming quality of the reinforcing rib;

[0021] A detection module connected to the control module, the detection module is used to detect the temperature of the raw material rod, the pressing force of the semicircular plate on the raw material rod, and the pressing speed of the semicircular plate on the raw material rod;

[0022] The processing module includes an evaluation unit and a judgment unit.

[0023] Preferably, the detection module comprises:

[0024] A pressing speed detection unit, comprising a laser speed sensor, the laser speed sensor being arranged on the top plate, and the laser speed sensor being used to detect the pressing speed of the semicircular plate on the raw material rod;

[0025] A pressure detection unit, comprising a pressure sensor, wherein the pressure sensor is arranged on the arc surface of the semicircular plate, and the pressure sensor is used to detect the downward pressure of the semicircular plate on the raw material rod;

[0026] The temperature detection unit has a temperature sensor. The temperature detection unit is arranged on the arc surface of the semicircular plate and is used to detect the temperature of the raw material rod.

[0027] Preferably, the molding box further has a slot, which is perpendicular to the cutting groove, and the raw material rod can pass through the slot and enter the placement cavity.

[0028] Preferably, the device further comprises:

[0029] A magnetic attraction block is arranged on the arc surface of the semicircular plate;

[0030] Among them, after being pressed and formed, when the semicircular plate rises, the semicircular plate magnetically absorbs the formed reinforcing ribs through two magnetic suction blocks embedded on the bottom side wall.

[0031] In a second aspect, the present application also provides a method for forming aircraft fuel tank reinforcement rib parts, the method comprising:

[0032] Step 1: Pass the raw material rod through the induction heater to heat the raw material rod, and then put the raw material rod horizontally into the placement cavity through the slot;

[0033] Step 2. When one end of the raw material rod is against the side wall of the placement cavity, the electric telescopic rod is started to descend. The electric telescopic rod descends and drives the cutter and the semicircular plate to descend through the sliding plate. Because the bottom end of the cutter is lower than the lowest end of the semicircular plate, the cutter will first enter the cutting groove when it descends and cut the raw material rod in the placement cavity along the cutter. After that, the semicircular plate continues to descend, and the semicircular plate presses the cut raw material rod in the placement cavity into the forming cavity, so as to form a semicircular reinforcement rib.

[0034] Preferably, step 2 comprises:

[0035] During the press forming process of the semicircular plate, the temperature, pressure and pressing speed of the raw material bar cut below the semicircular plate are detected by the temperature detection unit, the pressure detection unit and the pressing speed detection unit to form the temperature T, pressure W and pressing speed V, which are then transmitted to the evaluation unit for evaluation;

[0036] If at least one of the temperature T, pressure W, and pressing speed V exceeds the range of the first preset threshold, the value is adjusted until the value is within the range of the first preset threshold;

[0037] The temperature T, pressure W, and pressing speed V are summarized to form the detection condition information, a data model is constructed and optimized and trained, and the obtained temperature T, pressure W, and pressing speed V are subjected to regression analysis by analysis software to obtain the influence of temperature T, pressure W, and pressing speed V on the forming quality of the reinforcing rib, and the temperature influence factor At, pressure influence factor Aw, and pressing speed influence factor Av are output;

[0038] The evaluation unit obtains the temperature T, pressure W, and downward pressure speed V, and performs dimensionless processing on them to form a control coefficient CX. The correlation model is:

[0039]

[0040] Among them, At represents the combustion temperature influence factor; Aw represents the pressure influence factor; Av represents the pressing speed influence factor; GCZ represents the reinforcing rib influence coefficient; Q represents the cross-sectional radius value of the raw material rod, and R represents the radius value of the semicircular plate;

[0041] The acquired control coefficient CX is transmitted to the judgment unit for comparison with the second preset threshold value. If the control coefficient CX is not within the range of the second preset threshold value, a corresponding control instruction is generated to control the extension pressure and extension speed of the electric telescopic rod and the temperature of the raw material rod until the control coefficient CX is within the second preset threshold value, thereby ensuring the forming quality of the reinforcing rib.

[0042] This application has the following technical effects:

[0043] The present invention can ensure the forming quality of the reinforcing ribs by dynamically regulating the extension pressure and extension speed of the electric telescopic rod and the power of the induction heater, and has simple operation, high forming processing efficiency and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the structure of a forming device for aircraft fuel tank reinforcement rib parts proposed by the present invention;

[0045] Figure 2 This is a schematic cross-sectional structure diagram of a forming device for aircraft fuel tank reinforcement rib parts proposed by the present invention;

[0046] Figure 3 This is a schematic diagram of the bottom structure of the semicircular plate proposed by the present invention;

[0047] Figure 4 This is a schematic diagram of the structure of the reinforcing rib part proposed by the present invention;

[0048] Among them: 1. Top plate; 2. Electric telescopic rod; 3. Sliding plate; 4. Fixed plate; 5. Limiting column; 6. Semicircular plate; 7. Cutter; 8. Raw material rod; 9. Induction heater; 10. Cutting groove; 11. Forming box; 12. Forming cavity; 13. Laser speed sensor; 14. Slot; 15. Pressure sensor; 16. Temperature sensor; 17. Magnetic block; 18. Reinforcement parts; 19. Placement cavity. DETAILED DESCRIPTION

[0049] The present application provides a forming device for aircraft fuel tank reinforcement rib parts, comprising a forming box, a placement cavity is provided on the upper side of the forming box, a forming cavity is provided on the bottom side of the placement cavity, two limiting columns are fixedly connected to the upper side of the forming box, a top plate is fixedly connected to the upper ends of the two limiting columns, an electric telescopic rod is fixedly connected to the bottom side wall of the top plate, a sliding plate is fixedly connected to the bottom end of the electric telescopic rod, the sliding plate penetrates and is slidably connected to the two limiting columns, a fixed plate is fixedly connected to the bottom side wall of the sliding plate, a semicircular plate is fixedly connected to the bottom side of the fixed plate, the shape of the semicircular plate is adapted to the shape of the forming cavity, a pressure sensor and a temperature sensor are provided on the bottom side wall of the semicircular plate, a laser speed sensor is provided on the bottom side wall of the top plate, the laser speed sensor is used to measure the downward pressing speed of the sliding plate, an induction heater is fixedly connected to the side wall of the forming box, a slot is provided on the side wall of the placement cavity, the axis of the slot is colinear with the axis of the induction heating coil of the induction heater, and a cutting device is provided on one side of the placement cavity.

[0050] Preferably, the cutting device includes a cutting groove, which is opened on the upper side of the molding box, and is connected to the slot in a cross-shaped manner. The top side of the cutting groove is connected to the placement cavity, and a vertically arranged cutter is fixedly connected to the bottom side wall of the sliding plate, and the shape of the cutter is adapted to the shape of the cutting groove, and the cutter is located directly above the cutting groove.

[0051] Preferably, two magnetic blocks are embedded on the bottom side wall of the semicircular plate.

[0052] Preferably, a control mechanism is further included, wherein the control mechanism is used to adjust the extension pressure and extension speed of the electric telescopic rod and the power of the induction heater to ensure the forming quality of the reinforcing ribs.

[0053] Preferably, the control mechanism includes a control module, a detection module, and a processing module;

[0054] The control module is electrically connected to the electric telescopic rod and the induction heater;

[0055] The detection module includes a temperature detection unit for detecting the temperature of the raw material rod in the molding cavity, a pressure detection unit for detecting the pressing force of the semicircular plate on the raw material rod in the molding cavity, and a pressing speed detection unit for detecting the pressing speed of the semicircular plate on the raw material rod in the molding cavity;

[0056] The processing module includes an evaluation unit and a judgment unit.

[0057] Preferably, the temperature detection unit is a temperature sensor, the pressure detection unit is a pressure sensor, and the pressing speed detection unit is a laser speed sensor.

[0058] See also Figure 1 to Figure 4 In an embodiment of the present invention, a forming device for aircraft fuel tank reinforcement rib parts is provided, comprising a forming box 11, a placement cavity 19 is provided on the upper side of the forming box 11, a forming cavity 12 is provided on the bottom side of the placement cavity 19, two limiting columns 5 are fixedly connected to the upper side of the forming box 11, a top plate 1 is fixedly connected to the upper ends of the two limiting columns 5, an electric telescopic rod 2 is fixedly connected to the bottom side wall of the top plate 1, a sliding plate 3 is fixedly connected to the bottom end of the electric telescopic rod 2, the sliding plate 3 penetrates and is slidably connected to the two limiting columns 5, and a fixing plate 4 is fixedly connected to the bottom side wall of the sliding plate 3, A semicircular plate 6 is fixedly connected to the bottom side of the fixed plate 4, and the shape of the semicircular plate 6 is adapted to the shape of the forming cavity 12. A pressure sensor 15 and a temperature sensor 16 are provided on the bottom side wall of the semicircular plate 6. A laser speed sensor 13 is provided on the bottom side wall of the top plate 1. The laser speed sensor 13 is used to measure the downward pressing speed of the sliding plate 3. An induction heater 9 is fixedly connected to the side wall of the forming box 11. A slot 14 is opened on the side wall of the placement cavity 19. The axis of the slot 14 is colinear with the axis of the induction heating coil of the induction heater 9. A cutting device is provided on one side of the placement cavity 19.

[0059] Specifically, the cutting device includes a cutting groove 10, which is opened on the upper side of the molding box 11. The cutting groove 10 is connected to the slot 14 in a cross-shaped manner. The top side of the cutting groove 10 is connected to the placement cavity 19. A vertically arranged cutter 7 is fixedly connected to the bottom side wall of the sliding plate 3. The shape of the cutter 7 is adapted to the shape of the cutting groove 10, and the cutter 7 is located directly above the cutting groove 10.

[0060] The present invention also includes a control mechanism, which is used to regulate the extension pressure and extension speed of the electric telescopic rod 2 and the power of the induction heater 9 to ensure the forming quality of the reinforcing ribs.

[0061] The control mechanism includes a control module, a detection module, and a processing module;

[0062] The control module is electrically connected to the electric telescopic rod 2 and the induction heater 9;

[0063] The detection module includes a temperature detection unit for detecting the temperature of the raw material rod 8 in the molding cavity 12, a pressure detection unit for detecting the pressing force of the semicircular plate 6 on the raw material rod 8 in the molding cavity 12, and a pressing speed detection unit for detecting the pressing speed of the semicircular plate 6 on the raw material rod 8 in the molding cavity 12. The temperature detection unit is a temperature sensor 16, the pressure detection unit is a pressure sensor 15, and the pressing speed detection unit is a laser speed sensor 13;

[0064] The processing module includes an evaluation unit and a judgment unit.

[0065] In other embodiments of the present application, a forming method of an aircraft fuel tank reinforcement rib part is provided, which is used in a forming device of an aircraft fuel tank reinforcement rib part of any one of the above items, and specifically comprises the following steps:

[0066] S1, firstly, the raw material rod 8 is passed through the induction heater 9 to heat the raw material rod 8, and then the raw material rod 8 is horizontally placed into the placement cavity 19 through the slot 14;

[0067] S2, when one end of the raw material rod 8 is against the side wall of the placement cavity 19, the electric telescopic rod 2 is started to descend, and the electric telescopic rod 2 can drive the cutter 7 and the semicircular plate 6 to descend through the sliding plate 3. Because the bottom end of the cutter 7 is lower than the lowest end of the semicircular plate 6, the cutter 7 will first enter the cutting groove 10 when it descends and cut the raw material rod 8 in the placement cavity 19 along the cutter 7. Then the semicircular plate 6 continues to descend, and the semicircular plate 6 presses the cut raw material rod 8 in the placement cavity 19 into the forming cavity 12, so that a semicircular reinforcing rib part 18 is formed;

[0068] S3, during the pressing process of the semicircular plate 6, the temperature, pressure and pressing speed of the raw material rod 8 cut below the semicircular plate 6 can be detected by the temperature detection unit, the pressure detection unit and the pressing speed detection unit in the detection module, so as to form the temperature T, the pressure W and the pressing speed V, and transmit them to the evaluation unit for evaluation. If at least one of them exceeds the range of the corresponding first preset threshold value, the value exceeding the range is adjusted until it is within the range; wherein, the range of the first preset threshold value is obtained based on experience;

[0069] S4, the obtained temperature T, pressure W, and pressing speed V are summarized to form the detection condition information, a data model is constructed and optimized and trained, and the obtained temperature T, pressure W, and pressing speed V are subjected to regression analysis by analysis software to obtain the influence of temperature T, pressure W, and pressing speed V on the forming quality of the reinforcing rib, and the temperature influence factor At, pressure influence factor Aw, and pressing speed influence factor Av are output;

[0070] S5, the evaluation unit obtains the temperature T, pressure W, and downward pressure speed V, and performs dimensionless processing on them, and associates them to form a control coefficient CX, and its association model is:

[0071]

[0072] Among them, At represents the combustion temperature influence factor, 0.24≤At≤0.81; Aw represents the pressure influence factor, 0.51≤Aw≤0.64; Av represents the pressing speed influence factor, 0.47≤Av≤0.91; GCS represents the reinforcing rib influence coefficient; Q represents the cross-sectional radius value of the raw material rod 8, and R represents the radius value of the semicircular plate 6;

[0073] S6, the obtained control coefficient CX is transmitted to the judgment unit for comparison with the preset second preset threshold value. If the control coefficient CX is not within the range of the second preset threshold value, a corresponding control instruction is generated to control the extension pressure and extension speed of the electric telescopic rod 2 and the power of the induction heater 9 until the control coefficient CX is within the second preset threshold value, thereby ensuring the forming quality of the reinforcing rib. The range of the second preset threshold value is a range obtained from multiple tests based on the forming quality comparison.

[0074] After the pressing and forming, when the semicircular plate 6 rises, the semicircular plate 6 can magnetically absorb the formed reinforcing rib part 18 through the two magnetic blocks 17 embedded on the bottom side wall.

Claims

1. A forming device for aircraft fuel tank reinforcement parts, characterized in that: The device comprises: A forming box, comprising a forming cavity and a placing cavity, wherein the forming cavity is communicated with the placing cavity, the forming cavity is used for forming reinforcing ribs, and the placing cavity is used for placing raw material bars; An induction heater is arranged on one side of the forming box, and the induction heater is used to heat the raw material rod; An extrusion device is located above the forming box, the extrusion device is movably connected to the forming box, and the extrusion device is used to extrude the raw material rod until the raw material rod is formed into a reinforcing rib in the forming cavity; The control mechanism is used to adjust the extrusion pressure and extrusion speed of the extrusion device and the power of the induction heater to ensure the forming quality of the reinforcing ribs.

2. The device according to claim 1, characterized in that The extrusion device comprises: A limiting column, one end of which is connected to the forming box; A top plate connected to the other end of the limiting column; An electric telescopic rod, one end of which is connected to the top plate; A sliding plate, both ends of which are connected to the limiting posts, the sliding plate being able to slide along the limiting posts, and the middle portion of the upper surface of the sliding plate being connected to the other end of the electric telescopic rod; A fixed plate, one end of which is connected to the middle portion of the lower surface of the sliding plate; A semicircular plate is connected to the other end of the fixed plate; wherein, driven by the electric telescopic rod, the semicircular plate can move downward to squeeze the raw material rod until the raw material rod is formed into a reinforcing rib part in the forming cavity.

3. The device according to claim 2, characterized in that The molding box also has a cutting groove; the device also includes: A cutter is connected to the sliding plate; wherein, driven by the electric telescopic rod, the cutter can move downward to cut off the raw material rod and enter the cutting groove.

4. The device according to claim 3, characterized in that The control mechanism comprises: A control module is electrically connected to the electric telescopic rod and the induction heater; the control module is used to adjust the extension pressure and extension speed of the electric telescopic rod and the power of the induction heater to ensure the forming quality of the reinforcing rib; A detection module connected to the control module, the detection module is used to detect the temperature of the raw material rod, the pressing force of the semicircular plate on the raw material rod, and the pressing speed of the semicircular plate on the raw material rod; The processing module includes an evaluation unit and a judgment unit.

5. The device according to claim 4, characterized in that The detection module comprises: A pressing speed detection unit, comprising a laser speed sensor, the laser speed sensor being arranged on the top plate, and the laser speed sensor being used to detect the pressing speed of the semicircular plate on the raw material rod; A pressure detection unit, comprising a pressure sensor, wherein the pressure sensor is arranged on the arc surface of the semicircular plate, and the pressure sensor is used to detect the downward pressure of the semicircular plate on the raw material rod; The temperature detection unit has a temperature sensor. The temperature detection unit is arranged on the arc surface of the semicircular plate and is used to detect the temperature of the raw material rod.

6. The device according to claim 5, characterized in that The forming box also has a slot, which is perpendicular to the cutting groove, and the raw material rod can pass through the slot and enter the placement cavity.

7. The device according to claim 6, characterized in that The device also includes: A magnetic attraction block is arranged on the arc surface of the semicircular plate; Among them, after being pressed and formed, when the semicircular plate rises, the semicircular plate magnetically absorbs the formed reinforcing ribs through two magnetic suction blocks embedded on the bottom side wall.

8. A forming method for aircraft fuel tank reinforcement parts, characterized in that: The method comprises: Step 1: Pass the raw material rod through the induction heater to heat the raw material rod, and then put the raw material rod horizontally into the placement cavity through the slot; Step 2. When one end of the raw material rod is against the side wall of the placement cavity, the electric telescopic rod is started to descend. The electric telescopic rod descends and drives the cutter and the semicircular plate to descend through the sliding plate. Because the bottom end of the cutter is lower than the lowest end of the semicircular plate, the cutter will first enter the cutting groove when it descends and cut the raw material rod in the placement cavity along the cutter. After that, the semicircular plate continues to descend, and the semicircular plate presses the cut raw material rod in the placement cavity into the forming cavity, so as to form a semicircular reinforcement rib.

9. The method according to claim 8, characterized in that The step 2 comprises: During the press forming process of the semicircular plate, the temperature, pressure and pressing speed of the raw material bar cut below the semicircular plate are detected by the temperature detection unit, the pressure detection unit and the pressing speed detection unit to form the temperature T, pressure W and pressing speed V, which are then transmitted to the evaluation unit for evaluation; If at least one of the temperature T, pressure W, and pressing speed V exceeds the range of the first preset threshold, the value is adjusted until the value is within the range of the first preset threshold; The temperature T, pressure W, and pressing speed V are summarized to form the detection condition information, a data model is constructed and optimized and trained, and the obtained temperature T, pressure W, and pressing speed V are subjected to regression analysis by analysis software to obtain the influence of temperature T, pressure W, and pressing speed V on the forming quality of the reinforcing rib, and the temperature influence factor At, pressure influence factor Aw, and pressing speed influence factor Av are output; The evaluation unit obtains the temperature T, pressure W, and downward pressure speed V, and performs dimensionless processing on them to form a control coefficient CX. The correlation model is: Among them, At represents the combustion temperature influence factor; Aw represents the pressure influence factor; Av represents the pressing speed influence factor; GCZ represents the reinforcing rib influence coefficient; Q represents the cross-sectional radius value of the raw material rod, and R represents the radius value of the semicircular plate; The acquired control coefficient CX is transmitted to the judgment unit for comparison with the second preset threshold value. If the control coefficient CX is not within the range of the second preset threshold value, a corresponding control instruction is generated to control the extension pressure and extension speed of the electric telescopic rod and the temperature of the raw material rod until the control coefficient CX is within the second preset threshold value, thereby ensuring the forming quality of the reinforcing rib.

Images