A system for processing and forming airfoil-shaped blades

Abstract

The present application discloses an airfoil blade processing and forming system, comprising a pre-folding mold, a press mold and a forming and welding mold; a hinge shaft is rotatably mounted on one side of the positioning platform of the pre-folding mold; two ends of one side of the pre-folding plate are respectively connected to the two ends of the hinge shaft; spaces for the passage of blade blanks are provided between the hinge shaft and the positioning platform, and between the hinge shaft and the pre-folding plate; the left and right molds of the press mold are respectively slidably mounted on the left and right sides of the upper surface of the lower mold; the upper mold is mounted on the lower end of the mold frame; a longitudinal drive device is provided on the upper part of the upper mold, and the longitudinal drive device drives the upper mold to move downward; the output ends of the transverse drive device are respectively connected to the left and right molds, and the transverse drive device drives the left and right molds to move simultaneously toward the center of the lower mold; the forming and welding mold comprises a welding seat, and a plurality of clamping assemblies for clamping the blades. The present application solves the problem of low quality of airfoil blades with a hollow structure after processing in the prior art.

Description

Technical Field

[0001] The present application belongs to the field of blade processing technology, and specifically relates to an airfoil blade processing and forming system. Background Art

[0002] The airfoil-shaped fan blades used in ventilators, which are widely used in the national economy, are currently recognized as high-performance blades on the market. Due to the special shape of these blades, they are currently mostly limited to casting processes. Due to their large size, lighter alloy aluminum materials are chosen for casting. The strength and toughness of alloy aluminum materials are relatively poor, which limits the rotational speed of the blades during use. In turn, most blades operate at their strength limits, resulting in the blades often being unable to withstand the slightest careless blows, and even causing serious accidents. High-strength lightweight materials are expensive, making them difficult to popularize in conventional ventilators. Steel materials have excellent mechanical strength and excellent toughness, but the specific gravity of steel is more than twice that of aluminum, making it difficult to meet usage requirements.

[0003] Currently, creating a hollow blade structure significantly reduces blade weight while maintaining sufficient strength and toughness, enabling high linear speeds and significantly reducing raw material costs. However, for many years, a mature process for fully realizing the hollow airfoil-shaped wind turbine blades has not been available. Existing blade processing methods typically use two sheets of sheet metal, which are then welded together after forming. However, this welding process reduces the blade's structural strength and also results in poor transitions in the arc portion of the blade, thus affecting blade quality. Summary of the Invention

[0004] The embodiment of the present application solves the problem of low quality of airfoil-shaped blades with a hollow structure after processing in the prior art by providing an airfoil-shaped blade processing and forming system.

[0005] In order to achieve the above-mentioned object, an embodiment of the present invention provides an airfoil blade processing and forming system, comprising a pre-folding mold, a pressing mold, and a forming and welding mold;

[0006] The pre-folding mold includes a positioning platform, a pre-folding plate, and a hinge shaft;

[0007] A hinge shaft is rotatably mounted on one side of the positioning platform; two ends of one side of the pre-folded plate are respectively connected to two ends of the hinge shaft;

[0008] A space for the blade blank to pass through is provided between the hinge shaft and the positioning platform, and between the hinge shaft and the pre-folded plate;

[0009] The pressing mold includes a left mold, a right mold, a lower mold, an upper mold, a mold frame, a longitudinal drive device, and a transverse drive device;

[0010] The left mold and the right mold are slidably mounted on the left and right sides of the upper surface of the lower mold respectively; the upper mold is mounted on the lower end of the mold frame, and the structure of the upper mold is adapted to the inner surface structure of the blade;

[0011] A longitudinal drive device is provided on the upper portion of the upper mold, and the longitudinal drive device drives the upper mold to move downward; the output ends of the transverse drive device are respectively connected to the left mold and the right mold, and the transverse drive device drives the left mold and the right mold to move simultaneously toward the center of the lower mold;

[0012] The forming welding die comprises a welding seat and a plurality of clamping components for clamping the blades; the plurality of clamping components are arranged on the welding seat at intervals along the length direction of the blades.

[0013] In a possible implementation, the pre-folding mold further includes a fastening mechanism for fixing the blade blank, and the fastening mechanism includes a pressing plate, a fastening bolt, and a fastening seat;

[0014] The fastening seat is installed on the positioning platform, and the end of the fastening bolt passes through the through hole on the pressing plate and is screwed into the threaded hole on the fastening seat.

[0015] In a possible implementation, the pre-folding mold further includes a plurality of positioning plates for positioning the blade blank.

[0016] In a possible implementation, the lateral driving device includes a force application plate, a left push rod, and a right push rod;

[0017] There are two force-applying plates, which are respectively arranged at the front and rear ends of the upper mold, and the upper ends of the force-applying plates are connected to the lower surface of the mold frame;

[0018] A left oblique groove and a right oblique groove are respectively provided on the left and right sides of the force application plate, wherein the lower ends of the left oblique groove and the lower ends of the right oblique groove are respectively located at the left and right ends of the lower part of the force application plate, and the upper ends of the left oblique groove and the upper ends of the right oblique groove are both close to the center of the force application plate;

[0019] The left push rod is arranged on the outside of the left mold, and the two ends of the left push rod are respectively matched with the left oblique grooves on the two force application plates; the right push rod is arranged on the outside of the right mold, and the two ends of the right push rod are respectively matched with the right oblique grooves on the two force application plates;

[0020] When the mold frame drives the force plate to move downward, the end of the left push rod moves in the left oblique groove, and the end of the right push rod moves in the right oblique groove, so that the left mold and the right mold move toward the center of the lower mold at the same time.

[0021] In a possible implementation, the upper mold is mounted on the lower end of the mold frame through an elastic extrusion structure;

[0022] The elastic extrusion structure includes a limiting bracket, a buffer spring, and a base;

[0023] There are multiple limit brackets, and the multiple limit brackets and the lower surface of the mold frame enclose an installation space;

[0024] The upper end of the upper mold is connected to the lower surface of the base, the base is clamped in the installation space, and the buffer spring is arranged between the base and the mold frame.

[0025] In a possible implementation, the limiting bracket includes a vertical plate and a horizontal plate connected to each other, the vertical plate and the horizontal plate forming an L-shaped structure, and the end of the vertical plate is connected to the lower surface of the formwork;

[0026] The limiting bracket is arranged on the circumference of the base, the upper surface of the horizontal plate abuts against the lower surface of the base, and the side wall of the vertical plate abuts against the side wall of the base.

[0027] In a possible implementation, the blade template is further included, and the blade template includes a first surface and a second surface;

[0028] The first surface has the same planar structure as the working surface of the airfoil-shaped blade when unfolded, and the second surface has the same planar structure as the non-working surface of the airfoil-shaped blade when unfolded;

[0029] The first surface and the second surface are connected to form a plane. A butt joint is provided at the connection between the first surface and the second surface. The butt joint is located at the leading edge of the airfoil blade.

[0030] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0031] An embodiment of the present invention provides an airfoil blade processing and forming system. When using the blade processing and forming system to process a blade, the blade blank is first placed on a positioning table and a pre-folding plate. At this time, the blade blank is located below a hinge shaft. The position of the blade blank is adjusted, and then the pre-folding plate is flipped. The blade blank is gradually folded into a V-shaped blade blank under the action of the positioning table, the pre-folding plate, and the hinge shaft. When the angle of the V-shaped blade blank is 5° to 10°, the V-shaped blade blank is removed and placed in a heating furnace and heated to 500°C. The heated V-shaped blade blank is placed between a left mold and a right mold with its opening facing upward and laterally. The longitudinal drive device and the transverse drive device are simultaneously activated. The longitudinal drive device drives the upper mold downward through the mold frame, and the transverse drive device drives the left mold and the right mold toward the center. Under the extrusion of the lower mold, upper mold, left mold, and right mold, the V-shaped blade blank is gradually formed until the upper mold, left mold, and right mold are moved into position so that the V-shaped blade blank forms a shape consistent with the mold. After a period of holding, the mold is removed. The V-shaped blade blank after being pressed is placed on a forming welding die, so that the V-shaped blade blank is clamped and fixed by a clamping assembly. During welding, the blade blank between the two clamping assemblies is first welded. After the seam welding is qualified, the welding die is disassembled and the remaining parts are welded, thereby completing the preliminary processing of the blade. The present invention can accurately fold the blade blank into a V-shaped structure through a pre-folding die, and the blade blank can form the shape of the finished blade after being pressed by a pressing die. The blade blank after being pressed is a whole piece of material, which avoids the problem of dividing the blade into two parts in the prior art, resulting in poor effect of the arc part of the blade after docking, and the problem of two docking seams reducing the strength of the blade. The forming welding die can fix the blade blank well and will not damage the blade. The blade is not easily deformed during blade welding, thereby improving processing efficiency and blade quality. The forming process of the system is highly reliable, and the operating steps are simple, which can achieve the purpose of high-precision processing of the blade. The system solves the problem that currently it is impossible to form complete and qualified standard cavity airfoil-shaped fan blades using metal plates. The system improves the aerodynamic performance of the blades and reduces the cost of blades for this type of fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some of the embodiments described in this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0033] Figure 1 A schematic structural diagram of a pre-folding mold provided in an embodiment of the present invention.

[0034] Figure 2 A schematic diagram of the use status of the pre-folding mold provided in an embodiment of the present invention.

[0035] Figure 3 An exploded schematic diagram of a pressing mold provided in an embodiment of the present invention.

[0036] Figure 4 A schematic diagram of the use status of the pressing mold provided in an embodiment of the present invention.

[0037] Figure 5 This is a schematic structural diagram of a forming welding mold provided in an embodiment of the present invention.

[0038] Figure 6 for Figure 5 Top view of .

[0039] Figure 7 A schematic structural diagram of a clamping assembly provided in an embodiment of the present invention.

[0040] Figure 8 A schematic structural diagram of a blade template provided in an embodiment of the present invention.

[0041] Figure 9 This is a schematic diagram of the blade structure after processing and forming provided by an embodiment of the present invention.

[0042] Reference numerals: 100 - pre-folding mold; 110 - positioning plate; 120 - positioning platform; 130 - pre-folding plate; 140 - hinge shaft; 150 - fastening mechanism; 151 - pressing plate; 152 - fastening bolt; 153 - fastening seat;

[0043] 200 - press mold; 210 - left mold; 220 - right mold; 230 - lower mold; 231 - positioning groove; 240 - upper mold; 250 - mold frame; 260 - longitudinal drive device; 270 - transverse drive device; 271 - force plate; 2711 - left oblique groove; 2712 - right oblique groove; 272 - left push rod; 273 - right push rod; 280 - elastic extrusion structure; 281 - limit bracket; 2811 - vertical plate; 2812 - transverse plate; 282 - buffer spring; 283 - base;

[0044] 300-forming welding mold; 310-welding seat; 320-clamping assembly; 321-fixed plate; 322-movable plate; 323-hinge plate; 324-handle; 325-locking device; 3251-vertical plate; 3252-clamping plate; 330-limiting plate;

[0045] 400-blade blank;

[0046] 500-blade template; 501-first surface; 502-second surface; 503-butting line. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0048] In the description of the embodiments of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. The terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected" and "connected" 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, or it can be a communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0049] like Figures 1 to 9 As shown, the airfoil blade processing and forming system provided by the embodiment of the present invention includes a pre-folding mold 100, a pressing mold 200, and a forming and welding mold 300.

[0050] The pre-folding mold 100 includes a positioning table 120 , a pre-folding plate 130 , and a hinge shaft 140 .

[0051] A hinge shaft 140 is rotatably mounted on one side of the positioning platform 120. Two ends of one side of the pre-folding plate 130 are respectively connected to two ends of the hinge shaft 140.

[0052] A space for the blade blank 400 to pass through is provided between the hinge shaft 140 and the positioning platform 120 , and between the hinge shaft 140 and the pre-folding plate 130 .

[0053] The pressing mold 200 includes a left mold 210 , a right mold 220 , a lower mold 230 , an upper mold 240 , a mold frame 250 , a longitudinal driving device 260 , and a transverse driving device 270 .

[0054] The left mold 210 and the right mold 220 are respectively slidably mounted on the left and right sides of the upper surface of the lower mold 230. The upper mold 240 is mounted on the lower end of the mold frame 250, and the structure of the upper mold 240 is adapted to the inner surface structure of the blade.

[0055] A longitudinal drive unit 260 is provided above the upper mold 240 to move the upper mold 240 downward. A transverse drive unit 270 has output terminals connected to the left mold 210 and the right mold 220, respectively, to simultaneously move the left and right molds 210 and 220 toward the center of the lower mold 230.

[0056] The forming welding die 300 includes a welding seat 310 and a plurality of clamping assemblies 320 for clamping the blade. The plurality of clamping assemblies 320 are arranged on the welding seat 310 at intervals along the length direction of the blade.

[0057] It should be noted that the two ends of one side of the positioning platform 120 are respectively provided with hinge seats, and the two ends of the hinge shaft 140 are rotatably connected to the two hinge seats. The shape of the folded portion of the blade blank 400 is determined by the diameter of the hinge shaft 140.

[0058] The longitudinal drive device 260 adopts a hydraulic press. The transverse drive device 270 can simultaneously drive the left mold 210 and the right mold 220 to move toward the positioning groove 231, and the transverse drive device 270 and the longitudinal drive device 260 work simultaneously. Sliders are provided at the lower ends of the left mold 210 and the right mold 220, and the slides are clamped in the slide grooves on the upper surface of the lower mold 230. The slide grooves and the slides cooperate to prevent the left mold 210 and the right mold 220 from moving forward and backward. The upper mold 240 is a male mold, and the left mold 210, the right mold 220 and the lower mold 230 together form a female mold. The left mold 210 is adapted to the left outer surface structure of the blade. The right mold 220 is adapted to the right outer surface structure of the blade.

[0059] When using this blade processing and forming system to process blades, first place the blade blank 400 on the positioning table 120 and the pre-folding plate 130. At this time, the blade blank 400 is located below the hinge shaft 140. Adjust the position of the blade blank 400, and then flip the pre-folding plate 130. Under the action of the positioning table 120, the pre-folding plate 130 and the hinge shaft 140, the blade blank 400 is gradually folded into a V-shaped blade blank 400. When the angle of the V-shaped blade blank 400 is 5° to 10°, take out the V-shaped blade blank 400 and place it in a heating furnace and heat it to 500C°. The heated V-shaped blade blank 400 is opened upward and placed between the left mold 210 and the right mold 220, and the longitudinal drive device 260 and the transverse drive device 270 are started at the same time, so that the longitudinal drive device 260 drives the upper mold 240 to move downward through the mold frame 250, and at the same time drives the left mold 210 and the right mold 220 to move toward the middle through the transverse drive device 270. Under the extrusion of the lower mold 230, the upper mold 240, the left mold 210 and the right mold 220, the V-shaped blade blank 400 is gradually formed until the upper mold 240, the left mold 210 and the right mold 220 move into place, so that the V-shaped blade blank 400 forms a shape consistent with the mold. After maintaining it for a period of time, the mold is removed. The V-shaped blade blank 400 after being pressed is placed on the forming welding mold 300, so that the V-shaped blade blank 400 is clamped and fixed by the clamping assembly 320. During welding, the blade blank 400 between the two clamping assemblies 320 is first welded. After the seam welding is qualified, the welding mold is disassembled and the remaining parts are welded to complete the preliminary processing of the blade. The present invention can accurately fold the blade blank 400 into a V-shaped structure through the pre-folding mold 100, and the blade blank 400 can form the shape of the finished blade after being pressed by the pressing mold 200. The blade blank 400 after being pressed is a whole piece of material, which avoids the problem of dividing the blade into two parts in the prior art, resulting in poor effect of the arc part of the blade after docking, and the problem of two docking seams reducing the strength of the blade. The forming welding mold 300 can fix the blade blank 400 well without damaging the blade. The blade is not easily deformed during welding, thereby improving the processing efficiency and blade quality. The forming process of the system is highly reliable and the operation steps are simple, which can achieve the purpose of high-precision processing of the blade.

[0060] In this embodiment, the pre-folding mold 100 further includes a fastening mechanism 150 for fixing the blade blank 400 . The fastening mechanism 150 includes a pressing plate 151 , a fastening bolt 152 , and a fastening seat 153 .

[0061] The fastening seat 153 is mounted on the positioning platform 120 , and the end of the fastening bolt 152 passes through the through hole on the pressing plate 151 and is screwed into the threaded hole on the fastening seat 153 .

[0062] It should be noted that after the blade blank 400 is adjusted into position, the blade blank 400 and the positioning platform 120 are relatively fixed by the fastening mechanism 150. By tightening the fastening bolts 152, the pressing plate 151 can relatively fix the blade blank 400 and the positioning platform 120. The contact surface of the pressing plate 151 and the blade blank 400 is provided with a rubber layer.

[0063] In this embodiment, the pre-folding mold 100 further includes a plurality of positioning plates 110 for positioning the blade blank 400 .

[0064] It should be noted that when adjusting the position of the blade blank 400, the set position of the edge of the blade blank 400 is abutted against the positioning plate 110. A plurality of positioning plates 110 are provided at two adjacent edges of the blade blank 400, thereby facilitating rapid positioning of the blade blank 400.

[0065] The positioning plate 110 can be used as the fastening seat 153 of the fastening mechanism 150, thereby reducing the number of fastening seats 153 installed, so that the positioning plate 110 has both positioning and fastening functions. This embodiment is for the convenience of displaying the structure. Figure 1 The sizes of the middle positioning plate 110 and the fastening mechanism 150 are relatively large.

[0066] In this embodiment, a positioning groove 231 is provided at the center of the upper surface of the lower mold 230 . The structure of the positioning groove 231 is adapted to the leading edge structure of the blade, and the lower end of the upper mold 240 cooperates with the positioning groove 231 .

[0067] It should be noted that the positioning groove 231 plays a role in preliminarily positioning the V-shaped blade blank 400, and at the same time facilitates the lower mold 230 and the upper mold 240 to press the leading edge of the blade into shape.

[0068] In this embodiment, the transverse driving device 270 includes a force applying plate 271 , a left push rod 272 , and a right push rod 273 .

[0069] There are two force plates 271 , which are respectively disposed at the front and rear ends of the upper mold 240 . The upper ends of the force plates 271 are connected to the lower surface of the mold frame 250 .

[0070] A left oblique groove 2711 and a right oblique groove 2712 are respectively provided on the left and right sides of the force plate 271. The lower end of the left oblique groove 2711 and the lower end of the right oblique groove 2712 are respectively located at the left and right ends of the lower part of the force plate 271, and the upper end of the left oblique groove 2711 and the upper end of the right oblique groove 2712 are both close to the center of the force plate 271.

[0071] The left push rod 272 is disposed on the outside of the left mold 210, and the two ends of the left push rod 272 respectively cooperate with the left oblique grooves 2711 on the two force plates 271. The right push rod 273 is disposed on the outside of the right mold 220, and the two ends of the right push rod 273 respectively cooperate with the right oblique grooves 2712 on the two force plates 271.

[0072] When the mold frame 250 drives the force plate 271 to move downward, the end of the left push rod 272 moves in the left oblique groove 2711, and the end of the right push rod 273 moves in the right oblique groove 2712, so that the left mold 210 and the right mold 220 move toward the center of the lower mold 230 at the same time.

[0073] It should be noted that before the V-shaped blade blank 400 is placed, the mold frame 250 is positioned above the lower mold 230, with the right push rod 273 separated from the right inclined groove 2712, and the left push rod 272 separated from the left inclined groove 2711. The longitudinal drive device 260 drives the mold frame 250 downward, and the right push rod 273 moves into the right inclined groove 2712, and the left push rod 272 moves into the left inclined groove 2711. The mold frame 250 continues to drive the force plate 271 to move downward, and the left mold 210 can move toward the positioning groove 231 under the action of the left push rod 272 and the left oblique groove 2711, and the right mold 220 can move toward the positioning groove 231 under the action of the right push rod 273 and the right oblique groove 2712. Therefore, the left mold 210 and the right mold 220 can move toward the positioning groove 231 at the same time under the action of the force plate 271, thereby achieving the purpose of synchronous movement of the left mold 210 and the right mold 220. When the mold is closed, it only needs to be driven by the longitudinal drive device 260 to achieve the purpose of synchronous movement of the upper mold 240, the left mold 210 and the right mold 220. Therefore, the mold has a simple structure and strong practicality.

[0074] In this embodiment, the upper mold 240 is mounted on the lower end of the mold frame 250 via an elastic extrusion structure 280 .

[0075] The elastic extrusion structure 280 includes a limiting bracket 281 , a buffer spring 282 , and a base 283 .

[0076] There are multiple limiting brackets 281 , and the multiple limiting brackets 281 and the lower surface of the mold frame 250 enclose an installation space.

[0077] The upper end of the upper mold 240 is connected to the lower surface of the base 283 , the base 283 is clamped in the installation space, and the buffer spring 282 is disposed between the base 283 and the mold frame 250 .

[0078] It should be noted that the longitudinal drive device 260 drives the elastic extrusion structure 280 and the upper mold 240 to move downward at the same time through the mold frame 250. After the upper mold 240 contacts the V-shaped blade blank 400, it continues to descend until the upper mold 240 moves into place. At this time, the V-shaped blade blank 400 is squeezed and closed into shape by the lower mold 230, the upper mold 240, the left mold 210 and the right mold 220. The mold frame 250 continues to move downward, so that the elastic extrusion structure 280 is compressed until the mold frame 250 moves into place. The V-shaped blade blank 400 is further extruded and formed under the action of the elastic extrusion structure 280. The elastic extrusion structure 280 can further provide extrusion force to form the V-shaped blade blank 400, thereby improving the blade processing efficiency and reliability.

[0079] The base 283 is clamped in the installation space and can move up and down in the installation space. When the elastic extrusion structure 280 is compressed, the base 283 and the mold frame 250 are close to each other, so that the buffer spring 282 is compressed, thereby achieving a further extrusion effect.

[0080] The number and spring rate of the buffer springs 282 are selected based on the required extrusion force of the V-shaped blade blank 400 .

[0081] In this embodiment, the limiting bracket 281 includes a vertical plate 2811 and a horizontal plate 2812 connected to each other. The vertical plate 2811 and the horizontal plate 2812 form an L-shaped structure. The end of the vertical plate 2811 is connected to the lower surface of the mold frame 250.

[0082] The limiting bracket 281 is arranged on the circumference of the base 283 , the upper surface of the horizontal plate 2812 abuts against the lower surface of the base 283 , and the side wall of the vertical plate 2811 abuts against the side wall of the base 283 .

[0083] It should be noted that the limiting bracket 281 includes a vertical plate 2811 and a horizontal plate 2812, and has an L-shaped structure, which is simple and easy to install and maintain. The side walls of the vertical plate 2811 abut against the side walls of the base 283, which can prevent the base 283 from moving laterally, thereby further ensuring the accuracy of the blade profiling process.

[0084] In this embodiment, each clamping assembly 320 includes a handle 324 , a fixed plate 321 and a movable plate 322 .

[0085] The fixed plate 321 is installed on the welding seat 310, the end of the movable plate 322 and the end of the fixed plate 321 are hinged, and a clamping space for clamping the blade is formed between the lower surface of the movable plate 322 and the upper surface of the fixed plate 321. The lower surface of the movable plate 322 and the upper surface of the fixed plate 321 are structurally adapted to the blade surface with which they cooperate.

[0086] The hinge plate 323 is fixed to the fixed plate 321 , and the movable plate 322 is hinged through the hinge plate 323 and the end portion of the fixed plate 321 .

[0087] A handle 324 is provided at one end of the movable plate 322 away from the hinge plate 323 .

[0088] It should be noted that the fixed plate 321 and the movable plate 322 are both vertically arranged and coplanar. The lower surface of the movable plate 322 and the upper surface of the fixed plate 321 are structurally adapted to the blade surface to ensure that the blade profile meets the requirements after welding.

[0089] When the clamping assembly 320 is clamped, the V-shaped blade blank 400 after pressing is placed on the fixed plate 321, so that the upper surface of the fixed plate 321 of each clamping assembly 320 contacts the set position of the blade blank 400. After adjusting into place, the movable plate 322 is flipped over so that the fixed plate 321 and the movable plate 322 clamp and fix the blade blank 400.

[0090] The staff can operate the movable plate 322 through the handle 324, which on the one hand improves the convenience of using the mold, and on the other hand keeps the staff's hands away from the welding area to prevent the staff from being scalded after the blades are welded.

[0091] In this embodiment, limiting plates 330 are provided on both sides of the welding seat 310 , and a plurality of clamping assemblies 320 are provided between the limiting plates 330 on both sides.

[0092] It should be noted that when the blade blank 400 folded into a V-shape is placed on the fixing plate 321 , both ends of the blade blank 400 abut against the limiting plate 330 , thereby enabling rapid positioning of the blade blank 400 and improving processing efficiency.

[0093] In this embodiment, each clamping assembly 320 further includes a locking device 325 for fixing the movable plate 322 and the fixed plate 321 . The locking device 325 is disposed on one side of the handle 324 and includes a vertical plate 3251 and a clamping plate 3252 .

[0094] One end of the clamping plate 3252 is connected to the upper end of the vertical plate 3251. The vertical plate 3251 and the clamping plate 3252 are combined to form an L-shaped structure. The lower end of the vertical plate 3251 is fixed on the welding seat 310. The lower surface of the clamping plate 3252 matches the upper surface of the handle 324.

[0095] It should be noted that after each clamping assembly 320 clamps the blade, it can be secured by a locking device 325. Due to the large size of the blade, the movable plate 322 and handle 324 are relatively long, allowing the movable plate 322 and handle 324 to undergo a certain degree of elastic deformation. At the same time, the vertical plate 3251 can also undergo a certain degree of elastic deformation. In practice, the relative movement of the movable plate 322, handle 324, and vertical plate 3251 by 1 to 2 cm can meet the usage requirements. That is, the width of the clamping plate 3252 is less than 2 cm.

[0096] A latch can also be installed on the mating surface of the handle 324 and the clamping plate 3252 to prevent loosening, that is, the latch passes through the hole on the clamping plate 3252 and the hole on the handle 324 in sequence.

[0097] In this embodiment, a blade template 500 is further included, and the blade template 500 includes a first surface 501 and a second surface 502;

[0098] The first surface 501 has the same planar structure as the working surface of the airfoil blade when unfolded, and the second surface 502 has the same planar structure as the non-working surface of the airfoil blade when unfolded;

[0099] The first surface 501 and the second surface 502 are connected to form a plane. A butt joint 503 is provided at the connection between the first surface 501 and the second surface 502. The butt joint 503 is located at the leading edge of the airfoil blade.

[0100] It should be noted that cutting the metal sheet according to the blade template 500 can form the blade blank 400, thereby improving the cutting efficiency of the blade blank 400 and making it suitable for batch processing of blades. The butt line 503 is located at the leading edge of the blade. The butt line 503 can improve the accuracy of the subsequent folding process, so that the blade blank 400 can be accurately folded into the set V-shaped structure using the pre-folding mold 100.

[0101] In this embodiment, it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be included within the present invention.

Claims

1. An airfoil blade processing and forming system, characterized by: It comprises a pre-folding die (100), a pressing die (200), and a forming and welding die (300); The pre-folding mold (100) comprises a positioning platform (120), a pre-folding plate (130), and a hinge shaft (140); A hinge shaft (140) is rotatably mounted on one side of the positioning platform (120); two ends of one side of the pre-folded plate (130) are respectively connected to two ends of the hinge shaft (140); A space for the blade blank (400) to pass through is provided between the hinge shaft (140) and the positioning platform (120), and between the hinge shaft (140) and the pre-folding plate (130); The pressing mold (200) comprises a left mold (210), a right mold (220), a lower mold (230), an upper mold (240), a mold frame (250), a longitudinal driving device (260), and a transverse driving device (270); The left mold (210) and the right mold (220) are slidably mounted on the left and right sides of the upper surface of the lower mold (230), respectively; the upper mold (240) is mounted on the lower end of the mold frame (250), and the structure of the upper mold (240) is adapted to the inner surface structure of the blade; A longitudinal drive device (260) is provided on the upper portion of the upper mold (240), and the longitudinal drive device (260) drives the upper mold (240) to move downward; the output ends of the transverse drive device (270) are respectively connected to the left mold (210) and the right mold (220), and the transverse drive device (270) drives the left mold (210) and the right mold (220) to move simultaneously toward the center of the lower mold (230); The forming welding die (300) comprises a welding seat (310) and a plurality of clamping assemblies (320) for clamping the blade; the plurality of clamping assemblies (320) are arranged on the welding seat (310) at intervals along the length direction of the blade; The pre-folding mold (100) further comprises a fastening mechanism (150) for fixing the blade blank (400), wherein the fastening mechanism (150) comprises a pressing plate (151), a fastening bolt (152), and a fastening seat (153); The fastening seat (153) is installed on the positioning platform (120), and the end of the fastening bolt (152) passes through the through hole on the pressing plate (151) and is screwed into the threaded hole on the fastening seat (153); The pre-folding mold (100) further comprises a plurality of positioning plates (110) for positioning the blade blank (400); the positioning plates (110) serve as fastening seats (153) of the fastening mechanism (150); The transverse driving device (270) includes a force application plate (271), a left push rod (272), and a right push rod (273); There are two force-applying plates (271), which are respectively arranged at the front and rear ends of the upper mold (240), and the upper ends of the force-applying plates (271) are connected to the lower surface of the mold frame (250); A left oblique groove (2711) and a right oblique groove (2712) are respectively provided on the left and right sides of the force applying plate (271); the lower end of the left oblique groove (2711) and the lower end of the right oblique groove (2712) are respectively located at the left and right ends of the lower part of the force applying plate (271); and the upper end of the left oblique groove (2711) and the upper end of the right oblique groove (2712) are both close to the center of the force applying plate (271); The left push rod (272) is arranged on the outside of the left mold (210), and the two ends of the left push rod (272) are respectively matched with the left oblique grooves (2711) on the two force plates (271); the right push rod (273) is arranged on the outside of the right mold (220), and the two ends of the right push rod (273) are respectively matched with the right oblique grooves (2712) on the two force plates (271); When the mold frame (250) drives the force plate (271) to move downward, the end of the left push rod (272) moves in the left oblique groove (2711), and the end of the right push rod (273) moves in the right oblique groove (2712), so that the left mold (210) and the right mold (220) move toward the center of the lower mold (230) at the same time; The upper mold (240) is mounted on the lower end of the mold frame (250) via an elastic extrusion structure (280); The elastic extrusion structure (280) includes a limiting bracket (281), a buffer spring (282), and a base (283); There are multiple limit brackets (281), and the multiple limit brackets (281) and the lower surface of the mold frame (250) enclose an installation space; The upper end of the upper mold (240) is connected to the lower surface of the base (283), the base (283) is clamped in the installation space, and the buffer spring (282) is arranged between the base (283) and the mold frame (250).

2. The airfoil blade processing and forming system according to claim 1, characterized in that: The limiting bracket (281) comprises a vertical plate (2811) and a horizontal plate (2812) connected to each other, wherein the vertical plate (2811) and the horizontal plate (2812) form an L-shaped structure, and the end of the vertical plate (2811) is connected to the lower surface of the mold frame (250); The limiting bracket (281) is arranged on the circumference of the base (283), the upper surface of the horizontal plate (2812) abuts against the lower surface of the base (283), and the side wall of the vertical plate (2811) abuts against the side wall of the base (283).

3. The airfoil blade processing and forming system according to claim 1, characterized in that: Also included is a blade template (500), wherein the blade template (500) includes a first surface (501) and a second surface (502); The first surface (501) has the same planar structure as the working surface of the airfoil-shaped blade when unfolded, and the second surface (502) has the same planar structure as the non-working surface of the airfoil-shaped blade when unfolded; The first surface (501) and the second surface (502) are connected to form a plane, and a butt joint (503) is provided at the connection between the first surface (501) and the second surface (502), and the butt joint (503) is located at the leading edge of the airfoil blade.

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