A kind of axial flow fan metal blade processing partial pressure type straightening and shaping equipment

Abstract

The application relates to the technical field of fan processing, in particular to a pressure distribution type straightening and shaping equipment for processing metal blades of an axial flow fan, which comprises a bearing base and a material bearing disc assembled at the center of the top wall of the bearing base, a first lifting cylinder is arranged in linkage at the bottom of the material bearing disc and the center of the bearing base, limit clamping grooves for embedding and positioning blade roots are symmetrically arranged in the material bearing disc, and self-adapting floating pressing assemblies are arranged in the inner sides of the two groups of limit clamping grooves. The self-adapting floating clamping structure, the bidirectional pressure preforming structure and the multi-point pressure distribution type segmented straightening structure are cooperatively matched, so that the technical defects of the traditional equipment, such as poor blade forming curved surface precision, difficult elimination of local residual deformation, easy stress concentration of the blade under pressure, easy deformation damage of the blade root, poor adaptability and the like, are solved, the straightening and shaping quality in the metal blade processing process is improved, and the stability and durability of the blade under complex working conditions are ensured.

Description

Technical Field

[0001] This invention relates to the field of fan processing technology, specifically to an automated quantitative feeding device for a gantry milling machine. Background Technology

[0002] Axial flow fan metal blades (commonly made of stainless steel, carbon steel, aluminum alloy, etc.) are core components of ventilation, dust removal, and heat dissipation equipment. The profile accuracy, flatness, and torsion angle consistency directly determine the fan's aerodynamic efficiency, operating noise, and dynamic balance stability.

[0003] As a key working component of axial flow fans, metal blades undergo complex forming and processing conditions. The thin-walled curved surface structure makes the blades prone to axial extension and micro-torsional deformation during extrusion forming, requiring extremely high adaptability of the processing clamping and correction process. At the same time, blade forming needs to take into account the overall surface consistency and local micro-deformation correction, which imposes stringent technical standards on the equipment's forming pressure accuracy and segmented correction capability.

[0004] Currently, conventional straightening and shaping equipment technology is relatively limited, mostly employing rigid clamping and single-sided extrusion molding structures. This cannot adapt to the micro-deformation compensation during the blade forming process, and is prone to problems such as clamping loosening, workpiece damage, and uneven forming stress, resulting in poor consistency in batch forming. Moreover, the forming and straightening processes are independent of each other, making the process cumbersome and the production efficiency low. Most of them use a uniform pressure application or single-point rigid top pressure straightening mode, which cannot specifically correct local differential residual deformation of the blade, easily causing stress concentration and secondary deformation, resulting in limited forming accuracy and difficulty in meeting the requirements of high-precision blade processing.

[0005] To address the aforementioned technical shortcomings, this paper focuses on improving blade straightening accuracy, adaptability to working conditions, and production efficiency. It combines flexible floating clamping, bidirectional pressure preforming, and multi-point segmented pressure correction structure to solve problems such as large forming deviations, easy damage to workpieces, and poor versatility of traditional equipment, thereby meeting the processing requirements of high-precision axial flow fan metal blades. Summary of the Invention

[0006] The purpose of this invention is to combine the adaptive floating clamping structure, the bidirectional pressure preforming structure, and the multi-point pressure-dividing segmented straightening structure to solve the technical defects of traditional equipment, such as poor accuracy of blade forming surface, difficulty in eliminating local residual deformation, easy stress concentration of blades under pressure, easy deformation and damage at the root, and poor adaptability. This will improve the straightening and shaping quality in the metal blade processing process and ensure the stability and durability of blades under complex working conditions.

[0007] The objective of this invention can be achieved through the following technical solution: a pressure-dividing straightening and shaping device for processing metal blades of axial flow fans, comprising a bearing base and a material receiving tray assembled at the center of the top wall of the bearing base, wherein a first lifting cylinder is linked to the bottom of the material receiving tray and the center of the bearing base, and the material receiving tray is symmetrically provided with limiting slots for fitting and positioning the root of the blade, and an adaptive floating clamping component is assembled inside the two sets of limiting slots; Inside the bearing base, on both sides of the material receiving plate, there are bidirectional pressure forming modules for preforming the overall curved surface of the blade, and above the bidirectional pressure forming modules, there is a segmented local correction mechanism that can adaptively move with the curved surface of the blade.

[0008] Furthermore, the adaptive floating clamping assembly includes two sets of upright frames symmetrically installed on the outside of the limiting slots, and a convex floating abutment is longitudinally embedded inside the upright frame. A pressure spring ring is installed between the bottom of the convex floating abutment and the inner wall of the bottom of the upright frame, and a rectangular groove is provided at the lower end of the cylindrical body of the convex floating abutment. An inclined guide strip is provided on one side of the inner wall of the rectangular groove, and an axial alignment cylinder is transversely inserted inside the rectangular groove. An adapted inclined guide groove is provided at one end of the axial alignment cylinder corresponding to the inclined guide strip, and the inclined guide groove and the inclined guide strip are slidably engaged to form an inclined guiding displacement structure.

[0009] Furthermore, mounting plates are fixedly installed on the opposing surfaces of the two sets of axial alignment cylinders, and the bottom of the mounting plates extends into the slot, covering the positioning area at the root of the blade. An integrated top plate is fixedly installed on the top of several sets of convex floating abutments, and a second lifting cylinder is provided between the bottom of the integrated top plate and the top surface of the integrated top plate.

[0010] Furthermore, flexible clamping plates are movably installed on the opposing surfaces of the two sets of mounting plates, and movable blocks are fixedly installed at the four corners of the mounting plate corresponding to the side of the flexible clamping plate. The movable blocks are slidably connected to the ends of the embedded sliding grooves provided on the side walls of the mounting plates, and the front ends of the movable blocks and the side walls of the embedded sliding grooves are provided with composite elastic clamping springs.

[0011] Furthermore, the two sets of bidirectional pressure forming modules are detachably assembled on the inner sides of both ends of the bearing base. Each set of bidirectional pressure forming modules consists of arc-shaped extrusion forming plates arranged symmetrically front and rear. The opposite end faces of the two sets of extrusion forming plates are complementary arc surface structures that match the standard curved surface of the fan blades. The two sets of extrusion forming plates in the same row are fixedly installed with lateral transmission push plates at the ends away from the arc surface. A bidirectional drive motor is installed in the center of the relative interval area between the two sets of lateral transmission push plates. The front and rear output ends of the bidirectional drive motor are respectively coaxially equipped with threaded transmission screws with opposite directions of rotation. The two threaded transmission screws are respectively threadedly connected to the corresponding lateral transmission push plates to form a bidirectional threaded transmission structure.

[0012] Furthermore, the local correction mechanism includes a concave guide frame that is horizontally fixedly mounted on the inner wall of the bearing base and erected directly above the bidirectional pressure forming module. The upper and lower end faces of the guide frame are symmetrically provided with irregular contour arc grooves. The curvature of the irregular contour arc grooves is completely matched with the standard curvature of the metal blade to be processed. The front and rear inner walls of the guide frame are provided with transverse sliding grooves. The upper end of the guide frame is slidably sleeved with a displacement pusher with an inverted concave structure. A third horizontal cylinder is provided between the top end of the displacement pusher and the inner wall of the bearing base.

[0013] Furthermore, telescopic rods are fixedly installed at the middle sections of the front and rear inner walls of the displacement pusher, and a covering sliding sleeve is fixedly installed on the side of the telescopic rod away from the inner wall of the displacement pusher. The two sets of sliding sleeves are sleeved on the front and rear frames of the guide frame, and a limiting sliding shaft and an arc groove are fixedly installed on the upper and lower inner walls of the sliding sleeve to limit the sliding, forming a curved surface limiting sliding structure, so that the sliding sleeve can adaptively move along the curved surface trajectory of the blade.

[0014] Furthermore, a partition vertical plate is longitudinally arranged in the middle section of the inner cavity of the sliding sleeve, and a base frame is arranged from top to bottom on the plate surface of the partition vertical plate facing the opening side of the sliding sleeve. A micro airbag is embedded in the inner side of the base frame, and multiple sets of micro airbags are uniformly connected to an external inflation booster pump to achieve independent air pressure regulation. Each set of miniature airbags has an integrated pressure-bearing and force-transmitting plate on its side, and a pressure-dividing floating top rod is fixedly installed on the side of the pressure-bearing and force-transmitting plate away from the miniature airbag. The open end of the floating top rod extends to the side wall of the sliding sleeve, and a rebound spring is sleeved between the pressure-bearing and force-transmitting plate and the inner wall of the guide frame on the outside of the floating top rod. Wear-resistant steel balls are embedded in the open end of the floating top rod to achieve precise local straightening and shaping of the blades at different points by pressure-dividing.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes a bidirectional pressure forming module, employing a bidirectional drive motor paired with forward and reverse spiral threaded transmission screws to form a symmetrical bidirectional threaded transmission mechanism. This mechanism drives the synchronous opening and closing motion of the two arc-shaped extrusion forming plates. Furthermore, by employing the complementary arc-shaped curved surface structure of the two sets of extrusion plates, it precisely matches the standard curved surface profile of the metal blades of MVR compressor fans. This allows for the one-time completion of the pre-extrusion forming of the entire blade surface. Compared to traditional single-sided extrusion forming equipment, the bidirectional symmetrical pressure method balances the blade forming stress, avoiding problems such as overall offset and curved surface deviation caused by uneven force on one side of the blade, thus improving the consistency of batch blade forming.

[0016] This invention also features an adaptive floating clamping assembly. Through the oblique guiding and limiting structure of the oblique guide bar and oblique guide groove, combined with the pressure spring coil and the composite elastic clamping spring, a dual elastic compensation structure is formed. When the blade undergoes elastic, plastic deformation and axial extension during extrusion molding, the flexible clamping plate can synchronously and adaptively shift with the blade deformation, dynamically compensating for dimensional changes during blade processing, and always maintaining a tight fit with the blade root. This solves the problem of strong fixation and lack of deformation compensation space in traditional rigid clamping structures, effectively avoiding defects such as root torsion, slippage, extrusion deformation, and clamping loosening and displacement during blade forming.

[0017] This invention differs from the traditional method of uniform pressure correction. It innovatively employs a multi-point pressure-dividing local correction mechanism. Through the cooperation of a contoured arc groove and a limiting slide shaft, the sliding sleeve can slide along the standard curved surface of the blade, perfectly conforming to the blade's contour. Simultaneously, it is equipped with multiple sets of independently controllable micro-airbag pressure-dividing structures, which can individually adjust the inflation pressure of airbags at different points, driving the corresponding pressure-dividing floating push rods to apply precise pressure. This allows for point-to-point segmented correction of residual deformation and surface deviations in different areas of the blade, accurately eliminating minor local deformations and dimensional errors after blade forming. Furthermore, wear-resistant steel balls are embedded at the ends of the floating push rods, and the adaptive telescopic structure of the rebound spring enables flexible pressure correction. This avoids the problems of indentations, scratches, and local stress concentration on the blade surface caused by rigid pressure, and can adapt to the correction needs of blades with different degrees of deformation. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the support base of the present invention; Figure 3 This is a partial structural diagram of the adaptive floating clamping assembly of the present invention; Figure 4 This is a side view of the material receiving tray and the adaptive floating clamping assembly of the present invention. Figure 5 This is a partial structural diagram of the local correction mechanism of the present invention; Figure 6 This is a half-sectional schematic diagram of the base frame of the present invention; Figure 7 This is a cross-sectional view of the sliding sleeve structure of the present invention.

[0020] In the diagram: 1. Bearing base; 2. Material receiving tray; 3. First lifting cylinder; 4. Adaptive floating clamping assembly; 41. Vertical frame; 42. Convex floating abutment; 43. Inclined guide bar; 44. Axial alignment cylinder; 45. Mounting plate; 46. Integrated top plate; 47. Second lifting cylinder; 48. Flexible clamping plate; 49. Movable block; 5. Bidirectional pressure forming module; 51. Extrusion forming plate; 52. Lateral transmission push plate; 53. Bidirectional drive motor; 54. Threaded transmission screw; 6. Local correction mechanism; 61. Guide frame; 62. Displacement push frame; 63. Third horizontal cylinder; 64. Telescopic rod; 65. Sliding sleeve; 66. Partition vertical plate; 67. Base frame; 68. Miniature airbag; 69. Pressure transmission plate; 610. Floating top rod. Detailed Implementation

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1-2 As shown, a pressure-dividing straightening and shaping equipment for processing metal blades of axial flow fans includes a bearing base 1 and a material receiving plate 2 assembled at the center of the top wall of the bearing base 1. A first lifting cylinder 3 is linked to the bottom of the material receiving plate 2 and the center of the bearing base 1. The material receiving plate 2 is symmetrically provided with limiting slots for fitting and positioning the root of the blade. An adaptive floating clamping component 4 is assembled inside the two sets of limiting slots. Inside the bearing base 1, on both sides of the material receiving plate 2, there are bidirectional pressure forming modules 5 for preforming the overall curved surface of the blade, and above the bidirectional pressure forming modules 5, there is a segmented local correction mechanism 6 that can adapt to the displacement of the blade curved surface. Two sets of bidirectional pressure forming modules 5 are detachably assembled on the inner sides of both ends of the bearing base 1. Each set of bidirectional pressure forming modules 5 consists of arc-shaped extrusion forming plates 51 arranged symmetrically front and rear. The opposite end faces of the two sets of extrusion forming plates 51 are complementary arc surface structures that match the standard curved surface of the fan blades. The two sets of extrusion forming plates 51 in the same row are fixedly installed with lateral transmission push plates 52 at the ends away from the arc surface. A bidirectional drive motor 53 is installed in the middle of the relative interval area of ​​the two sets of lateral transmission push plates 52. The front and rear output ends of the bidirectional drive motor 53 are respectively coaxially equipped with threaded transmission screws 54 with opposite directions of rotation. The two threaded transmission screws 54 are respectively threadedly connected to the corresponding lateral transmission push plates 52 to form a bidirectional threaded transmission structure.

[0023] The specific forming process includes: first, placing two sets of fan blades to be processed on both sides of the receiving plate 2, and achieving initial positioning through the limiting slots, so that the root of the blade is tightly fitted with the adaptive floating clamping component, ensuring that the blade remains stable during subsequent processing; then, starting the first lifting cylinder 3 to adjust the height of the receiving plate 2, forcing the two sets of clamped metal blades to sink to the bidirectional pressure forming module 5, and then starting the bidirectional drive motor 53 to drive the threaded transmission screw 54 to rotate, so that the lateral transmission push plate 52 moves along the outer axial direction of the threaded transmission screw 54, thereby pushing the arc extrusion forming plate 51 to perform pre-forming operation on the blade; then, using the first lifting cylinder 3 to continue to lift, forcing the formed blade to move to the segmented local correction mechanism 6, and then adjusting the position in real time according to the change of the blade surface, applying precise pressure to the local area to eliminate residual deformation and improve forming accuracy. The entire processing flow achieves efficient and precise straightening and shaping effects through the coordinated operation of each module.

[0024] Example 2: Please refer to Figures 2-4 As shown, the adaptive floating clamping assembly 4 includes two sets of upright frames 41 symmetrically installed on the outside of the limiting slots. A convex floating abutment 42 is longitudinally embedded inside the upright frame 41. A pressure spring ring is installed between the bottom of the convex floating abutment 42 and the bottom inner wall of the upright frame 41. A rectangular groove is provided at the lower end of the cylindrical body of the convex floating abutment 42. An inclined guide bar 43 is provided on one side of the inner wall of the rectangular groove. An axial alignment cylinder 44 is transversely inserted inside the rectangular groove. An adapted inclined guide groove is provided at one end of the axial alignment cylinder 44 corresponding to the inclined guide bar 43. The inclined guide groove and the inclined guide bar 43 are slidably engaged to form an inclined guide displacement structure. Two sets of axial alignment cylinders 44 are fixedly installed with mounting plates 45 on opposite sides, and the bottom of the mounting plates 45 extends into the slot, covering the positioning area at the root of the blade. Several sets of convex floating abutments 42 are fixedly installed with an integrated top plate 46 on their tops, and a second lifting cylinder 47 is provided between the bottom of the integrated top plate 46 and the top surface of the integrated top plate 46. Flexible pressing plates 48 are movably installed on opposite sides of the two sets of mounting plates 45. The operation steps for positioning the roots of the two sets of blades include: first, embedding the roots of the two sets of fan blades into the limiting slots on the material receiving plate 2 respectively; then, starting the second lifting cylinder 47 to apply downward pressure, causing the integrated top plate 46 to move the convex floating abutment column 42 downward synchronously. At this time, the pressure spring coil is compressed, and the convex floating abutment column 42 slides longitudinally along the inner wall of the vertical frame 41. Through the cooperation of the inclined guide strip 43 and the inclined guide groove, the axial alignment cylinder 44 and the mounting plate 45 achieve lateral fine-tuning displacement, ensuring that the two sets of flexible clamping plates 48 can accurately fit the surface of the blade roots, thereby fixing the blades.

[0025] It is worth noting that when the metal blade is compressed, the deformation stress is transmitted to both ends, and the root is subjected to a torsional moment, which causes a slight tangential slip and a slight angular movement on the clamping surface. However, conventional clamping structures cannot move the blade after clamping and fixing the root of the metal blade, which easily causes deformation of the root of the metal blade. Therefore, the present invention fixes movable blocks 49 at the four corners of the flexible clamping plate 48 corresponding to the mounting plate 45. The movable blocks 49 are slidably connected to the end of the embedded sliding groove provided on the side wall of the mounting plate 45, and the front end of the movable block 49 and the side wall of the embedded sliding groove are provided with a composite elastic clamping spring. When the metal blade is extruded, the blade body undergoes elastic and plastic deformation, resulting in axial extension. Therefore, the flexible clamping plate 48 will adaptively adjust to follow the axial extension of the clamped blade. Specifically, the movable block 49 slides in the embedded sliding groove, while the composite elastic clamping spring dynamically applies compensating pressure according to the deformation of the blade, ensuring that the flexible clamping plate 48 always keeps in close contact with the blade surface. This design effectively avoids the problem of clamping loosening caused by blade extension, thereby improving the stability and accuracy of the straightening and shaping process. In addition, to further enhance the applicability of the equipment, the contact surface of the flexible clamping plate is made of a wear-resistant material with a high coefficient of friction, and an anti-slip texture is formed through surface microstructure treatment. This design not only increases the clamping force, but also reduces damage to the surface of the metal blades, ensuring that the blades maintain good surface quality throughout the processing.

[0026] Example 3: Please refer to Figure 2 , Figures 5-7 As shown, the local correction mechanism 6 includes a concave guide frame 61 that is horizontally fixedly mounted on the inner wall of the bearing base 1 and erected directly above the bidirectional pressure forming module 5. The guide frame 61 has irregular contoured arc grooves symmetrically opened on its upper and lower ends. The curvature of the irregular contoured arc grooves is completely matched with the standard curvature of the metal blade to be processed. The guide frame 61 has transverse sliding grooves on its front and rear inner walls. The guide frame 61 has an inverted concave structure displacement pusher 62 that is slidably sleeved on its upper end. A third horizontal cylinder 63 is provided between the top end of the displacement pusher 62 and the inner wall of the bearing base 1. Telescopic rods 64 are fixedly installed at the middle section of the front and rear inner walls of the displacement pusher 62, and a wrapping sliding sleeve 65 is fixedly installed on the side of the telescopic rods 64 away from the inner wall of the displacement pusher 62. The two sets of sliding sleeves 65 are sleeved on the front and rear frames of the guide frame 61, and the upper and lower inner walls of the sliding sleeves 65 are fixedly installed with limiting sliding shafts and arc-shaped grooves to limit sliding, forming a curved surface limiting sliding structure, so that the sliding sleeves 65 can adaptively move along the curved surface trajectory of the blade. A partition vertical plate 66 is longitudinally arranged in the middle section of the inner cavity of the sliding sleeve 65, and a base frame 67 is arranged from top to bottom on the plate surface of the partition vertical plate 66 facing the opening side of the sliding sleeve 65. A micro airbag 68 is embedded in the inner side of the base frame 67. Multiple micro airbags 68 are connected to an external inflation booster pump to achieve independent air pressure regulation. Each set of miniature airbags 68 has an integrated pressure-bearing and force-transmitting plate 69 on its side. A pressure-dividing floating top rod 610 is fixedly installed on the side of the pressure-bearing and force-transmitting plate 69 away from the miniature airbag 68. The open end of the floating top rod 610 extends to the side wall of the sliding sleeve 65. A rebound spring is sleeved between the pressure-bearing and force-transmitting plate 69 and the inner wall of the guide frame 61 on the outside of the floating top rod 610. Wear-resistant steel balls are embedded in the open end of the floating top rod 610 to achieve precise local straightening and shaping of the blades at different points.

[0027] The segmented straightening process after forming includes: First, the third horizontal cylinder 63 is activated to push the displacement pusher 62 to move laterally along the guide frame 61, so that the sliding sleeve 65 adapts to the blade surface according to the preset trajectory. During this process, the micro airbag 68 achieves independent air pressure regulation through the external air pressure boosting pump, ensuring that the pressure-bearing force transmission plate 69 and the pressure-dividing floating top rod 610 apply precise pressure to different areas of the blade. The rebound reset spring dynamically adjusts the extension length of the floating top rod 610 according to the blade deformation. The steel ball can roll freely when it contacts the blade surface, avoiding scratches or indentations on the blade. When the local correction mechanism 6 is running, the sliding sleeve 65 moves along the irregular contour arc groove trajectory, and the limiting slide shaft ensures that its movement is smooth and accurately matches the standard curvature of the blade. If there is local residual deformation of the blade, the air pressure of the micro airbag 68 at the corresponding position is adjusted so that the floating top rod 610 applies additional pressure to the area to gradually eliminate the deviation. This process is repeated many times until the blade as a whole reaches the surface accuracy required by the design.

[0028] In addition, to improve the straightening efficiency, the equipment adopts multi-point synchronous straightening, that is, the micro airbags 68 in multiple base frames 67 work together to process different areas of the blade in segments at the same time. This method not only shortens the processing time, but also significantly reduces the stress concentration problem caused by excessive force at a single point, thereby further improving the straightening and shaping effect.

[0029] Working principle: When using this invention, first place two sets of fan blades to be processed on both sides of the material receiving plate 2, and achieve initial positioning through the limiting slot to ensure that the root of the blade is tightly fitted with the adaptive floating pressing component 4, thereby providing stable support for subsequent processing.

[0030] Subsequently, the first lifting cylinder is activated to adjust the height of the material receiving plate, allowing the blade to gradually enter the working area of ​​the bidirectional pressure forming module 5. During this process, the bidirectional drive motor 53 drives the threaded transmission screw 54 to rotate, pushing the lateral transmission push plate 52 to move axially, thereby driving the arc extrusion forming plate 51 to perform pre-forming operations on the blade. The complementary arc surface structure of the arc extrusion forming plate 51 can accurately match the standard curved surface of the wind turbine blade, ensuring the shape consistency in the pre-forming stage.

[0031] After preforming is completed, the first lifting cylinder 3 continues to lift the material receiving plate and transfer the blade to the local correction mechanism 6. At this time, the third horizontal cylinder 63 pushes the displacement pusher 62 to move laterally along the guide frame 61. The sliding sleeve 65 adjusts its position adaptively according to the blade surface trajectory. The micro airbag 68 independently controls the air pressure through the external inflation booster pump, so that the pressure-dividing floating top rod 610 applies precise pressure to different areas of the blade. The rebound reset spring dynamically adjusts the extension length of the floating top rod 610 according to the blade deformation. The rolling design of the steel ball effectively avoids damage to the blade surface.

[0032] During local straightening, if residual deformation is found in the blade, the pressure of the micro airbags 68 at the corresponding positions can be adjusted to increase the pressure of the floating push rod 610 on that area, gradually eliminating the deviation. This process can be repeated multiple times until the blade as a whole reaches the surface accuracy required by the design. The multi-point synchronous straightening design further improves processing efficiency. The micro airbags 68 in multiple base frames 67 work together to process different areas of the blade in segments, which not only shortens the processing time but also significantly reduces the stress concentration problem caused by excessive force at a single point, thereby achieving efficient and precise straightening and shaping effects.

[0033] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A kind of axial flow fan metal blade processing partial pressure type straightening and shaping equipment, it is characterized by: It includes a support base (1) and a material receiving plate (2) assembled at the center of the top wall of the support base (1). The bottom of the material receiving plate (2) is linked to the center of the support base (1) and a first lifting cylinder (3) is provided. The material receiving plate (2) is symmetrically provided with limiting slots for fitting and positioning the root of the blade. Both sets of limiting slots are equipped with adaptive floating clamping components (4). The bearing base (1) is symmetrically equipped with a bidirectional pressure forming module (5) for preforming the overall curved surface of the blade inside and on both sides of the material receiving plate (2), and a segmented local correction mechanism (6) that can adapt to the displacement of the blade curved surface is correspondingly installed directly above the bidirectional pressure forming module (5).

2. The partial pressure type straightening and shaping apparatus for processing metal blades of an axial flow fan according to claim 1, wherein The adaptive floating clamping assembly (4) includes two sets of upright frames (41) symmetrically installed on the outside of the limiting slot. A convex floating abutment (42) is longitudinally embedded inside the upright frame (41). A pressure spring ring is installed between the bottom of the convex floating abutment (42) and the inner wall of the bottom of the upright frame (41). A rectangular groove is provided at the lower end of the cylindrical body of the convex floating abutment (42). An inclined guide strip (43) is provided on one side of the inner wall of the rectangular groove. An axial alignment cylinder (44) is transversely inserted inside the rectangular groove. A matching inclined guide groove is provided at one end of the axial alignment cylinder (44) corresponding to the inclined guide strip (43). The inclined guide groove and the inclined guide strip (43) are slidably engaged to form an inclined guide displacement structure.

3. The pressure-dividing straightening and shaping equipment for processing axial flow fan metal blades according to claim 2, characterized in that, The front and rear sets of axial alignment cylinders (44) are respectively fixedly installed with mounting plates (45) on their opposite sides, and the bottom of the mounting plates (45) extends into the slot, covering the positioning area at the root of the blade. The top of several sets of convex floating abutments (42) are jointly fixedly installed with an integrated top plate (46), and a second lifting cylinder (47) is jointly provided between the bottom of the integrated top plate (46) and the top surface of the integrated top plate (46).

4. The pressure-dividing straightening and shaping equipment for processing axial flow fan metal blades according to claim 3, characterized in that, Two sets of mounting plates (45) are movably mounted on opposite sides with flexible clamping plates (48), and movable blocks (49) are fixedly mounted on the four corners of the mounting plates (45) respectively. The movable blocks (49) are slidably connected to the end of the embedded sliding groove provided on the side wall of the mounting plate (45), and the front end of the movable block (49) and the side wall of the embedded sliding groove are provided with a composite elastic clamping spring.

5. The pressure-dividing straightening and shaping equipment for processing axial flow fan metal blades according to claim 1, characterized in that, Two sets of bidirectional pressure forming modules (5) are detachably assembled on the inner sides of both ends of the bearing base (1). Each set of bidirectional pressure forming modules (5) consists of arc-shaped extrusion forming plates (51) arranged symmetrically in front and behind. The opposite end faces of the two sets of extrusion forming plates (51) are complementary arc surface structures that match the standard curved surface of the fan blade. The two sets of extrusion forming plates (51) in the same row are fixedly installed with lateral transmission push plates (52) at the ends away from the arc surface. The bidirectional drive motor (53) is installed in the middle of the relative interval area of ​​the two sets of lateral transmission push plates (52). The front and rear output ends of the bidirectional drive motor (53) are respectively coaxially equipped with threaded transmission screws (54) with opposite rotation directions. The two threaded transmission screws (54) are respectively threadedly connected to the corresponding lateral transmission push plates (52) to form a bidirectional threaded transmission structure.

6. The pressure-dividing straightening and shaping equipment for processing axial flow fan metal blades according to claim 1, characterized in that, The local correction mechanism (6) includes a concave guide frame (61) that is horizontally fixedly mounted on the inner wall of the bearing base (1) and erected directly above the bidirectional pressure forming module (5). The guide frame (61) has irregular contour arc grooves symmetrically opened on its upper and lower ends. The curvature of the irregular contour arc groove is completely matched with the standard curvature of the metal blade to be processed. The guide frame (61) has transverse sliding grooves on its front and rear inner walls. The guide frame (61) has a displacement pusher (62) with an inverted concave structure that is slidably sleeved on its upper end. A third horizontal cylinder (63) is provided between the top end of the displacement pusher (62) and the inner wall of the bearing base (1).

7. The pressure-dividing straightening and shaping equipment for processing axial flow fan metal blades according to claim 6, characterized in that, Telescopic rods (64) are fixedly installed at the middle section of the front and rear inner walls of the displacement pusher (62), and a wrapping sliding sleeve (65) is fixedly installed on the side of the telescopic rod (64) away from the inner wall of the displacement pusher (62). The two sets of sliding sleeves (65) are sleeved on the front and rear frames of the guide frame (61), and the upper and lower inner walls of the sliding sleeves (65) are fixedly installed with limiting sliding shafts and arc grooves to limit sliding, forming a curved surface limiting sliding structure, so that the sliding sleeves (65) can adaptively move along the curved surface trajectory of the blade.

8. The pressure-dividing straightening and shaping equipment for processing axial flow fan metal blades according to claim 7, characterized in that, The sliding sleeve (65) has a partition vertical plate (66) longitudinally arranged in the middle section of the inner cavity. The partition vertical plate (66) facing the opening side of the sliding sleeve (65) has a base frame (67) arranged from top to bottom. The base frame (67) is embedded with a micro airbag (68). Multiple sets of micro airbags (68) are connected to an external inflation booster pump to achieve independent air pressure regulation. Each of the micro airbags (68) is integrally mounted with a pressure-bearing force transmission plate (69) on its side, and a pressure-dividing floating top rod (610) is fixedly mounted on the side of the pressure-bearing force transmission plate (69) away from the micro airbag (68). The open end of the floating top rod (610) extends to the side wall of the sliding sleeve (65) and a rebound spring is sleeved between the pressure-bearing force transmission plate (69) and the inner wall of the guide frame (61) on the outside of the floating top rod (610). Wear-resistant steel balls are embedded in the open end of the floating top rod (610) to achieve precise local straightening and shaping of the blade at different points.

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