Machining method and device for flow guide pipe of complex curved-surface thin-wall part

Abstract

The invention relates to a machining method and device for a flow guide pipe of a complex curved-surface thin-wall part, and belongs to the field of aero-engines. Comprising the following steps that S1, a drawing die, a forming die and a flanging die are designed and manufactured according to curved surface coordinates of the flow guide pipe; s2, simulating the forming machining process of the flow guide pipe, and determining the expansion amount of a blank plate; s3, the blank plate is bent through the drawing die, and the front edge of the flow guide pipe is formed on the blank plate; s4, the blank plate is subjected to punch forming through a forming die, and the flow guide pipe basin direction, the flow guide pipe back direction and the flow guide pipe tail edge are formed on the blank plate; s5, flanging is conducted on the blank plate through a flanging die, and a flow guide pipe flanging is formed on the blank plate; s6, the tail edges of the two flow guide pipes are welded; s7, a plurality of flow guide pipe micropores are machined in the front edge of the flow guide pipe; and S8, the machining effect of the flow guide pipe is verified through a cavity simulation piece. According to the method, the forming manufacturing and assembling difficulty of the aero-engine turbine blade complex inner cavity flow guide pipe can be reduced.

Description

Technical Field

[0001] The invention relates to the field of aeroengines, and in particular to a method and a device for processing a flow guide tube of a thin-walled part with a complex curved surface. Background Art

[0002] Turbine components are among the components with the heaviest thermal and mechanical loads in aircraft engines. Since the working environment of turbine blades is particularly harsh, they are subjected to high temperature, high pressure, and gas impact after combustion during the engine cycle. Therefore, turbine blade cooling manufacturing technology is also listed as one of the key technologies of modern aircraft engines.

[0003] At present, the key technologies for turbine blade manufacturing are mainly reflected in high-efficiency air-cooling design and manufacturing technology, material technology, and surface coating protection technology. With the continuous improvement of the engine thrust-to-weight ratio, the temperature of the turbine inlet is getting higher and higher. As the engine's requirements for turbine blades become more and more stringent, the precision requirements for turbine blades are also getting higher and higher. In the face of complex multi-jointed hollow turbine blades, thin-walled parts need to be assembled in the blade cavity to form a double-layer structure to achieve the effect of blade cooling.

[0004] Therefore, it is difficult to process thin-walled parts, especially for special-shaped cavities. The shape after forming needs to match the shape of the blade cavity. The processing and assembly of the blind cavity of the blade cavity is particularly challenging. The gap between the matching needs to meet the specific airflow to meet the assembly requirements. Since the blade body has holes of different rules, it is necessary to process corresponding holes on the guide tube for matching assembly. During assembly, the holes of the guide tube need to coincide with the micro-holes of the blade cavity to meet the assembly requirements. This puts higher requirements on the forming and manufacturing of the guide tube. Especially for blades with blind holes in the blade cavity, it is more difficult to meet the requirements of blade assembly. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a method and device for processing a flow guide tube with a complex curved surface and a thin-walled part, so as to solve the above-mentioned problem.

[0006] The technical solution of the present invention to solve the above technical problem is as follows: A method for processing a flow guide tube with a complex curved surface and a thin-walled part comprises the following steps:

[0007] S1: Design and manufacture the stretching die, forming die and flanging die according to the curved surface coordinates of the guide tube;

[0008] S2: simulating the forming process of the guide tube in a three-dimensional design software to determine the expansion amount of the blank;

[0009] S3: using the stretching die in step S1 to bend the blank in step S2 to form a leading edge of the guide tube on the blank;

[0010] S4: using the forming die in step S1 to stamp the blank stretched in step S3 to form a guide pipe basin, a guide pipe back and a guide pipe trailing edge on the blank;

[0011] S5: flanging the blank formed by stamping in step S4 using the flanging die in step S1, so as to form a guide tube flanging with the guide tube basin of the blank facing upward and the guide tube back facing upward;

[0012] S6: welding the two trailing edges of the guide pipes;

[0013] S7: machining a plurality of flow guide tube microholes on the front edge of the flow guide tube to form the flow guide tube;

[0014] S8: Verify the processing effect of the guide tube using a cavity simulation part.

[0015] The beneficial effects of the present invention are as follows: the processing device for designing and manufacturing the guide tube is designed through the surface coordinates of the designed guide tube, which is conducive to making the manufacture of the guide tube and the subsequent assembly with the inner cavity of the turbine blade more targeted. The stretching die, the forming die and the flanging die realize the stamping surface processing of the guide tube of the complex curved thin-walled part through forming and stamping, and cooperate with the processing of the micropores of the guide tube, which is conducive to reducing the forming and manufacturing difficulty of the complex inner cavity guide tube of the turbine blade of the aircraft engine. The processing effect of the guide tube is verified by the cavity simulation part, which is conducive to optimizing the assembly process method and improving the reliability in the subsequent actual assembly process with the inner cavity of the turbine blade.

[0016] Another technical solution of the present invention to solve the above technical problems is as follows: A processing device for a guide tube of a complex curved thin-walled part comprises: a drawing die, a forming die and a flanging die; the drawing die comprises: a drawing upper die, a drawing lower die and a plurality of drawing die guide columns, the drawing upper die and the drawing lower die are slidably connected through the drawing die guide columns, and the blank to be bent is adapted to be arranged on the drawing lower die; the forming die comprises: a forming upper die, a forming lower die, a plurality of forming die guide columns and a core, the forming upper die and the forming lower die are slidably connected through the drawing die guide columns, and the blank to be bent is adapted to be arranged on the drawing lower die; the forming die comprises: a forming upper die, a forming lower die, a plurality of forming die guide columns and a core, the forming upper die and the forming lower die are slidably connected through the drawing die guide columns, and the blank to be bent is adapted to be arranged on the drawing lower die The forming die guide column is slidably connected, the core is arranged on the forming lower die, and the blank to be stamped is adapted to be arranged on the core; the flanging die comprises: a flanging upper die, a flanging lower die, a guide tube placement die, an eccentric wheel mechanism and a plurality of flanging die guide columns, the flanging upper die and the flanging lower die are slidably connected through the flanging die guide columns, the guide tube placement die and the eccentric wheel mechanism are both installed on the flanging lower die, the blank to be flanged is adapted to be arranged on the guide tube placement die, and abuts against the eccentric wheel mechanism.

[0017] The beneficial effects of the present invention are as follows: the stretching die is conducive to stamping out the leading edge of the guide tube on the blank plate by closing the stretching upper die and the stretching lower die; the forming die is conducive to stamping out the basin direction, the back direction and the trailing edge of the guide tube from the blank plate placed on the core by closing the forming upper die and the forming lower die; the flanging die is conducive to stamping out the guide tube flange from the blank plate fixed between the guide tube placement die and the eccentric wheel mechanism by closing the flanging upper die and the flanging lower die, thereby reducing the difficulty of forming and manufacturing the complex inner cavity guide tube of the turbine blade of an aircraft engine.

[0018] Based on the above technical solution, the present invention can also be improved as follows.

[0019] Furthermore, the stretching lower die includes: an elastic device, a plurality of unloading screws, a pressure ring, a stretching punch and a stretching lower base plate; the unloading screw gap passes through the stretching lower base plate and is connected to the pressure ring, the stretching punch is installed on the top of the pressure ring, and the elastic device gap passes through the stretching lower base plate and is connected to the pressure ring.

[0020] The beneficial effects of adopting the above-mentioned further scheme are: the gap of the elastic device passes through the stretching lower bottom plate and is connected to the pressure ring, which is conducive to pushing the stretching punch on the pressure ring upward and cooperating with the stretching upper mold to complete the mold closing. The gap of the unloading screw passes through the stretching lower bottom plate and is connected to the pressure ring, which is conducive to providing guidance for the up and down displacement of the pressure ring and the stretching punch, thereby ensuring the stability of the mold closing.

[0021] Furthermore, the stretching upper die includes: a stretching upper base plate, a stretching die, a plurality of stretching upper die fixing pins and a stretching upper die handle; the stretching die is installed on the bottom end of the stretching upper base plate through the stretching upper die fixing pins, the stretching upper die handle is arranged on the top end of the stretching upper base plate, and a plurality of the stretching die guide columns are fixedly arranged on the stretching lower base plate and pass through the stretching upper base plate in a gap; the blank to be bent is adapted to be placed on the stretching punch, and is stamped to form the leading edge of the guide tube when the stretching die and the stretching punch are closed.

[0022] The beneficial effect of adopting the above further scheme is that the upper die handle of the stretching die is installed on the punching machine, which is conducive to utilizing the pressure of the punching machine to achieve mold closing, and then to achieve the stamping of the blank plate. The stretching die guide column is conducive to providing guidance for the stretching die closing, thereby ensuring stability during mold closing.

[0023] Furthermore, the molding lower die comprises: a molding lower base plate, a molding concave die and a plurality of molding lower die fixing pins; the molding concave die is installed on the top of the molding lower base plate through the molding lower die fixing pins, and the core is arranged on the top of the molding concave die.

[0024] The beneficial effect of adopting the above further scheme is that the core is set at the top of the forming die, which is conducive to placing the blank with the leading edge of the guide tube formed, and forming the guide tube basin, guide tube back and guide tube trailing edge under the cooperation and clamping action of the forming upper die.

[0025] Furthermore, the forming upper die includes: a forming upper base plate, a forming punch, a plurality of forming upper die fixing pins and a forming upper die handle; the forming punch is installed at the bottom end of the forming upper base plate through the forming upper die fixing pins, the forming upper die handle is arranged at the top end of the forming upper base plate, and a plurality of the forming die guide columns are fixedly arranged around the forming lower base plate and pass through the forming upper base plate in a gap; the blank to be stamped and formed is stamped to form a guide tube basin, a guide tube back and a guide tube tail edge when the forming punch and the forming die are closed.

[0026] The beneficial effect of adopting the above further solution is that the upper forming die handle is installed on the punching machine, which is conducive to using the pressure of the punching machine to drive the upper forming die to move and cooperate with the lower forming die to achieve mold closing.

[0027] Furthermore, the flanging upper die includes: a flanging upper base plate, a fixed plate, a plurality of flanging upper die fixing pins, a flanging punch and a flanging upper die handle; the fixed plate is installed on the bottom end of the flanging upper base plate through the flanging upper die fixing pins, the flanging punch is installed on the bottom end of the fixed plate, and the flanging upper die handle is installed on the top end of the flanging upper base plate.

[0028] The beneficial effect of adopting the above further scheme is that the upper die handle of the flanging is installed on the punching machine, which is conducive to using the pressure of the punching machine to drive the upper die of the flanging to move, and cooperate with the lower die of the flanging and the guide tube placement die to realize the stamping forming of the guide tube flange.

[0029] Furthermore, the flanging lower die includes a flanging lower bottom plate and a plurality of flanging lower die fixing pins, and the guide tube placement die includes: a fixed die, a movable die, an inner guide column and a spring; the fixed die is installed on the top of the flanging lower bottom plate through the flanging lower die fixing pins, and the movable die can be movably arranged above the flanging lower bottom plate, the inner guide column passes through the fixed die and the movable die, the spring is sleeved on the inner guide column, and the two ends are connected to the inner wall of the fixed die and the inner wall of the movable die in a one-to-one manner, and the blank to be flanging is adapted to be arranged on the side of the fixed die close to the movable die, and abuts against the movable die.

[0030] The beneficial effect of adopting the above further scheme is that the inner guide column and the spring are conducive to adjusting the distance between the movable die and the fixed die, thereby clamping the blank placed on the fixed die, making it easier to stamp the blank when the subsequent flanging upper die is closed downward.

[0031] Furthermore, the eccentric wheel mechanism includes: a fixed column, a rotating column and a rotating handle; the fixed column is fixedly installed on the top of the flange lower base plate, the rotating column is rotatably installed on the top of the fixed column, the fixed column and the rotating column are non-coaxially arranged, the rotating handle is installed on the side wall of the rotating column, and the rotating handle abuts against the movable die when driving the rotating column to rotate.

[0032] The beneficial effect of adopting the above further scheme is that the fixed column and the rotating column are not coaxially arranged, which is conducive to driving the rotating column to rotate by turning the handle, so that the rotating column abuts against the movable die and drives the movable die to move, thereby achieving clamping of the blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A flow chart of a processing method provided by an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the structure of a stretching upper die provided in an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of a blank plate after being bent by a stretching upper die provided in an embodiment of the present invention;

[0036] Figure 4 A schematic structural diagram of a molding die provided in an embodiment of the present invention;

[0037] Figure 5 A schematic diagram of a blank plate after being stamped by a forming die provided in an embodiment of the present invention;

[0038] Figure 6 A side view of a flanging die provided by an embodiment of the present invention;

[0039] Figure 7 A front view of a flanging die provided in an embodiment of the present invention;

[0040] Figure 8 A schematic diagram of the structure of a blank plate after being flanging by a flanging die provided in an embodiment of the present invention;

[0041] Fig. 9 A processing schematic diagram of step S6 provided in an embodiment of the present invention;

[0042] Fig.10 A processing schematic diagram of step S7 provided in an embodiment of the present invention;

[0043] Fig.11 This is a processing schematic diagram of step S8 provided in an embodiment of the present invention.

[0044] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0045] 1. Stretching die; 2. Forming die; 3. Flanging die; 4. Guide pipe; 5. Cavity simulation part; 11. Stretching upper die; 12. Stretching lower die; 13. Stretching die guide column; 21. Forming upper die; 22. Forming lower die; 23. Forming die guide column; 24. Core; 31. Flanging upper die; 32. Flanging lower die; 33. Guide pipe placement die; 34. Eccentric wheel mechanism; 35. Flanging die guide column; 41. Guide pipe front edge; 42. Guide pipe basin direction; 43. Guide pipe back direction; 44. Guide pipe tail edge; 45. Guide pipe flanging; 111. Stretching upper bottom plate; 112. Stretching concave die; 113. Stretching upper die fixing pin; 114. Stretching upper die handle; 121. Elasticizer; 122. Discharge screw nail; 123, pressure ring; 124, stretching punch; 125, stretching lower base plate; 211, forming upper base plate; 212, forming punch; 213, forming upper die fixing pin; 214, forming upper die handle; 221, forming lower base plate; 222, forming die; 223, forming lower die fixing pin; 311, flanging upper base plate; 312, fixed plate; 313, flanging upper die fixing pin; 314, flanging punch; 315, flanging upper die handle; 321, flanging lower base plate; 322, flanging lower die fixing pin; 331, fixed die; 332, movable die; 333, inner guide column; 334, spring; 341, fixed column; 342, rotating column; 343, rotating handle; 441, guide tube micropore. DETAILED DESCRIPTION

[0046] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0047] like Figure 1 As shown, a method for processing a flow guide tube with a complex curved surface and a thin-walled part comprises the following steps:

[0048] S1: designing and manufacturing a stretching die 1, a forming die 2 and a flanging die 3 according to the curved surface coordinates of the guide tube 4;

[0049] S2: simulating the forming process of the guide tube 4 in a three-dimensional design software to determine the expansion amount of the blank;

[0050] S3: using the stretching die 1 in step S1 to bend the blank in step S2, so as to form a leading edge 41 of the guide tube on the blank;

[0051] S4: using the forming die 2 in step S1 to stamp the blank stretched in step S3, so as to form a guide tube basin 42, a guide tube back 43 and a guide tube trailing edge 44 on the blank;

[0052] S5: using the flanging die 3 in step S1 to flanging the blank formed by stamping in step S4, and forming a guide tube flanging 45 on the guide tube basin side 42 and the guide tube back side 43 of the blank;

[0053] S6: welding the two trailing edges 44 of the guide tubes;

[0054] S7: machining a plurality of guide tube micro-holes 441 on the guide tube front edge 41 to form the guide tube 4;

[0055] S8: Verify the processing effect of the guide tube 4 using the cavity simulation part 5 .

[0056] It should be noted that: in step S3, the blank plate forming the leading edge 41 of the guide tube is V-shaped, such as Figure 3 As shown;

[0057] Since the blank is initially a plate-like structure, the guide tube 4 needs to be formed into a tubular structure after multiple stamping steps, so in step S6, the trailing edges 44 of the two guide tubes are spot welded together, which is conducive to forming a tubular structure;

[0058] In step S7, according to the corresponding requirements of the hole positions on the inner cavity of the turbine blade, a plurality of guide tube microholes 441 are processed on the leading edge 41 of the guide tube by an electric spark drilling method to form the guide tube 4;

[0059] In step S8, the cavity simulation part 5 verifies the processing effect of the guide tube 4 through the assembly principle corresponding to the shaft hole.

[0060] The beneficial effects of the present invention are as follows: the processing device for designing and manufacturing the guide tube is designed through the surface coordinates of the designed guide tube, which is conducive to making the manufacture of the guide tube and the subsequent assembly with the inner cavity of the turbine blade more targeted. The stretching die, the forming die and the flanging die realize the stamping surface processing of the guide tube of the complex curved thin-walled part through forming and stamping, and cooperate with the processing of the micropores of the guide tube, which is conducive to reducing the forming and manufacturing difficulty of the complex inner cavity guide tube of the turbine blade of the aircraft engine. The processing effect of the guide tube is verified by the cavity simulation part, which is conducive to optimizing the assembly process method and improving the reliability in the subsequent actual assembly process with the inner cavity of the turbine blade.

[0061] like Figures 2 to 8 As shown, a processing device for a flow guide tube of a complex curved thin-walled part comprises: a stretching die 1, a forming die 2 and a flanging die 3;

[0062] The stretching die 1 comprises: a stretching upper die 11, a stretching lower die 12 and a plurality of stretching die guide pillars 13, the stretching upper die 11 and the stretching lower die 12 are slidably connected through the stretching die guide pillars 13, and the blank to be bent is adapted to be arranged on the stretching lower die 12;

[0063] The molding die 2 comprises: an upper molding die 21, a lower molding die 22, a plurality of molding die guide pillars 23 and a core 24. The upper molding die 21 and the lower molding die 22 are slidably connected via the molding die guide pillars 23. The core 24 is arranged on the lower molding die 22. The blank to be stamped is adapted to be arranged on the core 24.

[0064] The flanging die 3 includes: a flanging upper die 31, a flanging lower die 32, a guide tube placement die 33, an eccentric wheel mechanism 34 and a plurality of flanging die guide columns 35. The flanging upper die 31 and the flanging lower die 32 are slidably connected via the flanging die guide columns 35. The guide tube placement die 33 and the eccentric wheel mechanism 34 are both mounted on the flanging lower die 32. The blank to be flanged is adapted to be arranged on the guide tube placement die 33 and abuts against the eccentric wheel mechanism 34.

[0065] The beneficial effects of the present invention are as follows: the stretching die is conducive to stamping out the leading edge of the guide tube on the blank plate by closing the stretching upper die and the stretching lower die; the forming die is conducive to stamping out the basin direction, the back direction and the trailing edge of the guide tube from the blank plate placed on the core by closing the forming upper die and the forming lower die; the flanging die is conducive to stamping out the guide tube flange from the blank plate fixed between the guide tube placement die and the eccentric wheel mechanism by closing the flanging upper die and the flanging lower die, thereby reducing the difficulty of forming and manufacturing the complex inner cavity guide tube of the turbine blade of an aircraft engine.

[0066] Preferably, Figure 2 As shown, the stretching lower die 12 includes: an elastic device 121, a plurality of unloading screws 122, a pressure ring 123, a stretching punch 124 and a stretching lower base plate 125; the unloading screw 122 passes through the stretching lower base plate 125 in a gap and is connected to the pressure ring 123, the stretching punch 124 is installed on the top of the pressure ring 123, and the elastic device 121 passes through the stretching lower base plate 125 in a gap and is connected to the pressure ring 123.

[0067] The beneficial effects of adopting the above-mentioned preferred scheme are: the gap of the elastic device passes through the stretching lower bottom plate and is connected to the pressure ring, which is conducive to pushing the stretching punch on the pressure ring upward and cooperating with the stretching upper mold to complete the mold closing. The gap of the unloading screw passes through the stretching lower bottom plate and is connected to the pressure ring, which is conducive to providing guidance for the up and down displacement of the pressure ring and the stretching punch, thereby ensuring the stability of the mold closing.

[0068] Preferably, Figure 2 and Figure 3As shown, the stretching upper die 11 includes: a stretching upper base plate 111, a stretching die 112, a plurality of stretching upper die fixing pins 113 and a stretching upper die handle 114; the stretching die 112 is installed on the bottom end of the stretching upper base plate 111 through the stretching upper die fixing pins 113, and the stretching upper die handle 114 is arranged on the top end of the stretching upper base plate 111, and a plurality of the stretching die guide columns 13 are fixedly wound around the stretching lower base plate 125 and pass through the stretching upper base plate 111 in a gap; the blank to be bent is adapted to be placed on the stretching punch 124, and is stamped to form the leading edge 41 of the guide tube when the stretching die 112 and the stretching punch 124 are closed.

[0069] The beneficial effects of adopting the above-mentioned preferred scheme are: the upper die handle of the stretching die is installed on the punching machine, which is conducive to utilizing the pressure of the punching machine to achieve mold closing, and then to achieve the stamping of the blank plate. The stretching die guide column is conducive to providing guidance for the stretching die closing, thereby ensuring stability during mold closing.

[0070] Preferably, Figure 4 As shown, the molding lower mold 22 includes: a molding lower base plate 221, a molding die 222 and a plurality of molding lower mold fixing pins 223; the molding die 222 is installed on the top of the molding lower base plate 221 through the molding die fixing pins 223, and the core 24 is arranged on the top of the molding die 222.

[0071] The beneficial effect of adopting the above preferred scheme is that the core is set at the top of the forming die, which is conducive to placing the blank with the leading edge of the guide tube formed, and forming the guide tube basin, guide tube back and guide tube trailing edge under the cooperation and clamping action of the forming upper die.

[0072] Preferably, Figure 4 and Figure 5 As shown, the molding upper die 21 includes: a molding upper base plate 211, a molding punch 212, a plurality of molding upper die fixing pins 213 and a molding upper die handle 214; the molding punch 212 is installed at the bottom end of the molding upper base plate 211 through the molding upper die fixing pins 213, the molding upper die handle 214 is arranged at the top end of the molding upper base plate 211, and a plurality of the molding die guide columns 23 are fixedly arranged around the molding lower base plate 221 and pass through the molding upper base plate 211 in a gap; the blank to be stamped is stamped to form a guide tube basin 42, a guide tube back 43 and a guide tube tail edge 44 when the molding punch 212 and the molding die 222 are closed.

[0073] The beneficial effect of adopting the above preferred solution is that the upper forming die handle is installed on the punching machine, which is conducive to using the pressure of the punching machine to drive the upper forming die to move and cooperate with the lower forming die to achieve mold closing.

[0074] Preferably, Figure 6 and Figure 7 As shown, the flanging upper die 31 includes: a flanging upper base plate 311, a fixed plate 312, a plurality of flanging upper die fixing pins 313, a flanging punch 314 and a flanging upper die handle 315; the fixed plate 312 is installed on the bottom end of the flanging upper base plate 311 through the flanging upper die fixing pins 313, the flanging punch 314 is installed on the bottom end of the fixed plate 312, and the flanging upper die handle 315 is installed on the top end of the flanging upper base plate 311.

[0075] The beneficial effect of adopting the above preferred scheme is that the upper die handle of the flanging is installed on the punching machine, which is conducive to using the pressure of the punching machine to drive the upper die of the flanging to move, and cooperate with the lower die of the flanging and the guide tube placement die to realize the stamping forming of the guide tube flange.

[0076] Preferably, Figure 6 and Figure 7 As shown, the flanging lower die 32 includes a flanging lower bottom plate 321 and a plurality of flanging lower die fixing pins 322, and the guide tube placement die 33 includes: a fixed die 331, a movable die 332, an inner guide column 333 and a spring 334; the fixed die 331 is installed on the top of the flanging lower bottom plate 321 through the flanging lower die fixing pins 322, the movable die 332 is movably arranged above the flanging lower bottom plate 321, the inner guide column 333 passes through the fixed die 331 and the movable die 332, the spring 334 is sleeved on the inner guide column 333, and the two ends are connected to the inner wall of the fixed die 331 and the inner wall of the movable die 332 in a one-to-one manner, and the blank to be flanging is adapted to be arranged on the side of the fixed die 331 close to the movable die 332, and abuts against the movable die 332.

[0077] The beneficial effect of adopting the above-mentioned preferred scheme is that the inner guide column and the spring are conducive to adjusting the distance between the movable die and the fixed die, thereby clamping the blank placed on the fixed die, making it easier to stamp the blank when the subsequent flanging upper die is closed downward.

[0078] Preferably, Figure 6 and Figure 7 As shown, the eccentric wheel mechanism 34 includes: a fixed column 341, a rotating column 342 and a rotating handle 343; the fixed column 341 is fixedly installed on the top of the flange lower base plate 321, the rotating column 342 is rotatably installed on the top of the fixed column 341, the fixed column 341 and the rotating column 342 are non-coaxially arranged, the rotating handle 343 is installed on the side wall of the rotating column 342, and the rotating handle 343 abuts against the movable die 332 when driving the rotating column 342 to rotate.

[0079] The beneficial effect of adopting the above preferred scheme is that the fixed column and the rotating column are not coaxially arranged, which is conducive to driving the rotating column to rotate by turning the handle, so that the rotating column abuts against the movable die and drives the movable die to move, thereby achieving clamping of the blank.

[0080] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0081] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0082] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0085] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for processing a flow guide tube with a complex curved surface and thin wall, characterized in that: The following steps are involved: S1: designing and manufacturing a stretching die (1), a forming die (2) and a flanging die (3) according to the curved surface coordinates of the flow guide tube (4); S2: simulating the forming process of the guide tube (4) in a three-dimensional design software to determine the expansion amount of the blank; S3: using the stretching die (1) in step S1 to bend the blank in step S2, so as to form a leading edge (41) of the guide tube on the blank; S4: using the forming die (2) in step S1 to stamp the blank plate stretched in step S3, so as to form a guide tube basin (42), a guide tube back (43) and a guide tube trailing edge (44) on the blank plate; S5: using the flanging die (3) in step S1 to flanging the blank formed by stamping in step S4, so as to form a guide tube flanging (45) on the guide tube basin side (42) and the guide tube back side (43) of the blank; S6: welding the two trailing edges of the guide tubes (44); S7: machining a plurality of flow guide tube micropores (441) on the front edge (41) of the flow guide tube to form the flow guide tube (4); S8: using the cavity simulation part (5) to verify the processing effect of the guide tube (4).

2. A processing device for a flow guide tube with a complex curved surface and thin wall, characterized in that: Based on the method for processing a flow guide tube with a complex curved surface and thin-walled parts as described in claim 1 above, the processing device for the flow guide tube with a complex curved surface and thin-walled parts comprises: a stretching die (1), a forming die (2) and a flanging die (3); The stretching die (1) comprises: a stretching upper die (11), a stretching lower die (12) and a plurality of stretching die guide pillars (13); the stretching upper die (11) and the stretching lower die (12) are slidably connected via the stretching die guide pillars (13); and the blank to be bent is adapted to be arranged on the stretching lower die (12); The molding die (2) comprises: an upper molding die (21), a lower molding die (22), a plurality of molding die guide columns (23) and a core (24); the upper molding die (21) and the lower molding die (22) are slidably connected via the molding die guide columns (23); the core (24) is arranged on the lower molding die (22); and the blank to be stamped is adapted to be arranged on the core (24); The flanging die (3) comprises: an upper flanging die (31), a lower flanging die (32), a guide tube placement die (33), an eccentric wheel mechanism (34) and a plurality of flanging die guide columns (35); the upper flanging die (31) and the lower flanging die (32) are slidably connected via the flanging die guide columns (35); the guide tube placement die (33) and the eccentric wheel mechanism (34) are both mounted on the lower flanging die (32); the blank to be flanged is adapted to be arranged on the guide tube placement die (33) and abuts against the eccentric wheel mechanism (34).

3. According to claim 2, a processing device for a flow guide tube with a complex curved surface and a thin wall, characterized in that: The stretching lower die (12) comprises: an elastic device (121), a plurality of unloading screws (122), a blank holder (123), a stretching punch (124) and a stretching lower base plate (125); the unloading screws (122) pass through the stretching lower base plate (125) in a gap and are connected to the blank holder (123); the stretching punch (124) is installed on the top of the blank holder (123); the elastic device (121) passes through the stretching lower base plate (125) in a gap and is connected to the blank holder (123).

4. According to claim 3, a processing device for a flow guide tube with a complex curved surface and a thin wall, characterized in that: The stretching upper die (11) comprises: a stretching upper base plate (111), a stretching die (112), a plurality of stretching upper die fixing pins (113) and a stretching upper die handle (114); the stretching die (112) is mounted on the bottom end of the stretching upper base plate (111) through the stretching upper die fixing pins (113), the stretching upper die handle (114) is arranged on the top end of the stretching upper base plate (111), and a plurality of the stretching die guide columns (13) are fixedly arranged around the stretching lower base plate (125) and pass through the stretching upper base plate (111) with gaps; the blank to be bent is adapted to be placed on the stretching punch (124), and is punched to form a leading edge (41) of the guide tube when the stretching die (112) and the stretching punch (124) are closed.

5. According to claim 2, a processing device for a flow guide tube with a complex curved surface and a thin wall, characterized in that: The molding lower die (22) comprises: a molding lower bottom plate (221), a molding concave die (222) and a plurality of molding lower die fixing pins (223); the molding concave die (222) is mounted on the top of the molding lower bottom plate (221) via the molding lower die fixing pins (223), and the core (24) is arranged on the top of the molding concave die (222).

6. The processing device for a flow guide tube with a complex curved surface and thin wall according to claim 5, characterized in that: The molding upper die (21) comprises: a molding upper base plate (211), a molding punch (212), a plurality of molding upper die fixing pins (213) and a molding upper die handle (214); the molding punch (212) is mounted on the bottom end of the molding upper base plate (211) through the molding upper die fixing pins (213), the molding upper die handle (214) is arranged on the top end of the molding upper base plate (211), and a plurality of molding die guide columns (23) are fixedly arranged around the molding lower base plate (221) and pass through the molding upper base plate (211) with gaps; the blank to be stamped is stamped to form a guide tube basin (42), a guide tube back (43) and a guide tube tail edge (44) when the molding punch (212) and the molding die (222) are closed.

7. The processing device for a flow guide tube with a complex curved surface and thin wall according to claim 2, characterized in that: The flanging upper die (31) comprises: a flanging upper base plate (311), a fixed plate (312), a plurality of flanging upper die fixing pins (313), a flanging punch (314) and a flanging upper die handle (315); the fixed plate (312) is mounted on the bottom end of the flanging upper base plate (311) through the flanging upper die fixing pins (313), the flanging punch (314) is mounted on the bottom end of the fixed plate (312), and the flanging upper die handle (315) is mounted on the top end of the flanging upper base plate (311).

8. The processing device for a flow guide tube with a complex curved surface and thin wall according to claim 7, characterized in that: The flanging lower die (32) comprises a flanging lower bottom plate (321) and a plurality of flanging lower die fixing pins (322); the guide tube placement die (33) comprises: a fixed concave die (331), a movable concave die (332), an inner guide column (333) and a spring (334); the fixed concave die (331) is mounted on the top of the flanging lower bottom plate (321) through the flanging lower die fixing pins (322); the movable concave die (332) is movably arranged on the flanging lower bottom plate (3 21), the inner guide column (333) passes through the fixed die (331) and the movable die (332), the spring (334) is sleeved on the inner guide column (333), and the two ends are connected to the inner wall of the fixed die (331) and the inner wall of the movable die (332) in a one-to-one manner, and the blank to be flanging is adapted to be arranged on a side of the fixed die (331) close to the movable die (332) and abuts against the movable die (332).

9. The processing device for a flow guide tube with a complex curved surface and thin wall according to claim 8, characterized in that: The eccentric wheel mechanism (34) comprises: a fixed column (341), a rotating column (342) and a rotating handle (343); the fixed column (341) is fixedly mounted on the top of the flange lower bottom plate (321); the rotating column (342) is rotatably mounted on the top of the fixed column (341); the fixed column (341) and the rotating column (342) are non-coaxially arranged; the rotating handle (343) is mounted on the side wall of the rotating column (342); and when the rotating handle (343) drives the rotating column (342) to rotate, it abuts against the movable concave mold (332).

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