A bending forming die and a bending forming method for a wind power generation bin inner plate

Abstract

The application discloses a bending forming die and a bending forming method of a wind power generation warehouse inner plate piece, which comprises a matching convex die and a clamping concave die arranged oppositely, a stamping block of the matching convex die is matched with an inner recess of the clamping concave die to stamp and bend one end of a batten, a transverse stamping convex die is arranged on one side of the inner recess, and the transverse stamping convex die corresponds to the transverse stamping of the bent end of the batten to make the batten form a bent installation plate with a fold line shape. The application provides a bending forming die and a bending forming method of a wind power generation warehouse inner plate piece, the flat batten is once bent through the stamping block matched with the inner recess, then the batten is twice bent in the transverse direction through the transverse stamping convex die, the batten after step-by-step processing forms a fold line shape, the stamping stress of the bent part of the batten is reduced, and the batten is prevented from being easily broken.

Description

Technical Field

[0001] This invention relates to the field of bending and forming molds for internal panels of wind turbine housings. Background Technology

[0002] Wind turbine housings are equipped with several installation components, including plates for installation. During plate production, forming molds are typically used to stamp the raw materials, forming them into plates of the desired shape. When bending forming molds are used to stamp the raw material strips, the raw material strips are usually bent and formed simultaneously in multiple places. However, directly stamping multiple locations can cause excessive stamping stress on the strips, making it easy for the bent parts to break. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a bending forming mold and bending forming method for the inner plate of a wind power generation silo. The straight plate is bent once by a stamping block in conjunction with an inner groove, and then the plate is bent a second time in the transverse direction by a horizontal punch. This makes the plate after step-by-step processing form a zigzag shape, which reduces the stamping stress on the bent part of the plate and avoids the plate from breaking easily.

[0004] Technical solution: To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] A bending forming mold for a panel inside a wind turbine housing includes a mating punch and a snap-fit ​​die that are arranged opposite to each other. The inner groove of the snap-fit ​​die is mated with the stamping block of the mating punch to stamp and bend one end of the panel strip. A transverse punch is provided on one side of the inner groove. The transverse punch is used to perform transverse stamping on the bent end of the panel strip, causing the panel strip to form a zigzag-shaped bent mounting plate.

[0006] Furthermore, the mating punch includes an upper die fixing plate, the bottom of which is fixed with a stamping block by bolts, and the bottom of the stamping block is integrally provided with an insert; the inserting die includes a lower die plate body, the top of which is provided with a lower die cavity by a rectangular spring, and the top center of the lower die cavity has an inner groove; the strip is placed in the inner groove, and the insert moves relative to the strip and is inserted into the inner groove and stamped onto the strip.

[0007] Furthermore, one side of the inner groove is open to serve as a material passage, and a support block is fixedly provided on the inner wall of the inner groove. The support block is positioned relative to the material passage, and an active range is formed between one side of the support block and the inner wall of the inner groove. A stop plate is slidably provided in the active range, and a driving device on the inner wall of the active range is drivenly connected to one side of the stop plate. The stop plate moves and presses against the side wall of the support block.

[0008] The distance between the bottom surface of the insert block and the bottom surface of the inner groove is set. A lifting support plate is provided at the bottom of the inner groove. The lifting support plate is set at the position corresponding to the material passage. An installation hole is opened on the bottom surface of the inner groove. A spring is installed in the installation hole. The top of the spring is fixed to the bottom surface of the lifting support plate. When the lifting support plate is at the top of the inner groove, the lifting support plate and the support block are combined to form a support platform. The strip is placed on the surface of the support platform between the inner wall of the inner groove and the side wall of the abutment plate, and then the abutment plate is used to press the strip together to limit its lateral movement.

[0009] Furthermore, a fitting groove is provided at the bottom of one end of the insert, and the bottom cross-section of the insert is S-shaped. When the insert is embedded in the inner groove, the fitting groove and the support block cooperate to compress the strip, and the end of the strip corresponding to the material outlet bends downward to abut against the lifting support plate and descends to the bottom of the inner groove. The cross-section of the bent section of the support block and the fitting groove is arc-shaped, thereby causing the strip to bend.

[0010] Furthermore, the support block has corresponding slots on its surface, and the inner wall of the fitting slot has an embedding groove. The embedding groove is provided with an elastic pressure block, the bottom end of which protrudes from the embedding groove. Multiple moving holes are formed through the elastic pressure block, and rods are provided in the moving holes. A drive rod on the inner wall of the moving hole is fixedly connected to the rod by a telescopic spring. The drive rod drives the rod in and out of the moving hole by the telescopic spring. The rod extends out of the moving hole, passes through the positioning hole on the strip, and embeds into the corresponding slot, or the rod extends out of the moving hole and presses against the surface of the strip.

[0011] Furthermore, a sliding groove is provided on the middle side wall of the support block, and a transverse punch is provided in the sliding groove. The transverse punch includes a transverse punch block and a telescopic rod. The transverse punch block is embedded in the movable groove. The driving device on the inner wall of the sliding groove is driven to one end of the telescopic rod, and the other end of the telescopic rod is fixedly connected to the transverse punch block. When the transverse punch block is embedded in the sliding groove, the side wall of the transverse punch block is flush with the side wall of the support block. A punch groove is provided on the top of the transverse punch block. One side of the punch groove is open, and the cross section of the other side of the punch groove is arc-shaped. When the transverse punch block punches the strip, the bent part of the strip is in the punch groove, and the lifting support plate rises and abuts against the bottom surface of the transverse punch block.

[0012] Furthermore, a filling hole is provided on the side wall of the support block, and the filling hole is located between the top surface of the support block and the sliding groove; a pushing structure is provided in the filling hole, the pushing structure includes a pushing plate, the driving device in the filling hole is driven and connected to one end of the pushing plate, the other end of the pushing plate forms the filling hole, the top surface of the pushing plate is spaced apart from the inner wall of the sliding groove, and the side wall of the pushing plate corresponds to the material passage of the strip; an elastic cavity is provided at the top of the end of the pushing plate away from the driving device, and the elastic cavity is connected to the air chamber through an air pipe in the pushing plate; when the elastic cavity enters the filling hole, the inner wall of the filling hole compresses the elastic cavity and contracts; when the elastic cavity extends out of the filling hole, the top of the elastic cavity expands, and the top of the elastic cavity abuts against the bottom surface of the strip.

[0013] Furthermore, the bending and forming method is as follows: First, the strip is placed on the support platform, and then the abutment moves against the side wall of the strip, thereby limiting the lateral movement of the strip;

[0014] In the second step, the stamping block drives the insert to move downward. When the insert contacts the surface of the strip, the drive rod drives the telescopic spring to push the rod downward against the strip or the rod passes through the positioning hole on the strip and embeds into the corresponding slot, thereby limiting the strip vertically.

[0015] The third step is that the insert presses the strip downwards, and the support block and the fitting groove cooperate to bend the strip, causing the side wall of the strip to stick to the side wall of the support block. At the same time, the bent strip moves downwards against the lifting support plate.

[0016] In the fourth step, the driving device drives the transverse punch block to punch the strip in the transverse direction, causing the strip to bend into a zigzag shape, and the strip is embedded in the corresponding punch groove. The lifting support plate moves upward and abuts against the bottom surface of the transverse punch block.

[0017] In the fifth step, after the stamping is completed, the stamping block drives the insert to disengage from the inner groove, and the driving device drives the push plate to push the strip through the elastic cavity, causing the strip to move out of the inner groove through the feed port; at the same time, when the strip disengages from the punch groove, the strip will move downward, and the bent part at the top of the strip will move downward to contact the elastic cavity, thereby reducing the collision between the strip and the push plate.

[0018] Beneficial effects: In this invention, a straight strip is placed in the inner groove of the die, and then the punching block on the punch moves and embeds into the inner groove. This allows the punch and the inner groove to bend and form the strip. Then, the punching punch presses the lower end of the bent strip in the lateral direction, causing the strip to undergo a second bending process. After two bending processes, the strip is processed into a zigzag-shaped piece with an arc-shaped cross-section. The rapid forming process using the bending die and the step-by-step bending method effectively prevents the easy breakage caused by direct punching and bending. The zigzag structure of the piece allows it to be installed in the wind turbine housing, and the piece forms mutual restraints with other components, improving stability and facilitating step-by-step bending. Attached Figure Description

[0019] Appendix Figure 1 This is a structural diagram of a bending forming die;

[0020] Appendix Figure 2 This is a diagram of the embedded die structure.

[0021] Appendix Figure 3 To match the punch structure diagram;

[0022] Appendix Figure 4 This is a structural diagram of the rod members;

[0023] Appendix Figure 5 This is a structural diagram of the transverse punch;

[0024] Appendix Figure 6 This is a diagram of the material feeding structure;

[0025] Appendix Figure 7 This is a structural diagram of the sheet metal parts. Detailed Implementation

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] As attached Figure 1-7A bending forming mold for a panel inside a wind turbine housing includes a mating punch 3 and a snap-fit ​​die 4 that are arranged in opposite directions. The inner groove 41 of the snap-fit ​​die 4 is mated with the stamping block 31 of the mating punch 3 to stamp and bend one end of the panel strip. A transverse punch 5 is provided on one side of the inner groove 41. The transverse punch 5 is used to perform transverse stamping on the bent end of the panel strip, causing the panel strip to form a zigzag-shaped bent mounting plate. A straight strip is placed in the inner groove of the die, and then the punching block on the punch moves and embeds itself into the inner groove. This allows the punch and the inner groove to bend and form the strip. Then, the punching punch presses the lower end of the bent strip in the lateral direction, causing the strip to be bent a second time. After two bends, the strip is processed into a zigzag-shaped plate 1 with an arc-shaped cross section. The bending forming die quickly forms the plate, and the step-by-step bending method with continuous processes effectively prevents the easy breakage caused by direct punching and bending. The zigzag structure of the plate 1 allows it to be installed in the wind turbine housing, and the plate 1 forms mutual restraints with other components, improving stability and facilitating step-by-step bending.

[0028] The mating punch 3 includes an upper die fixing plate 32, the bottom of which is fixed with a stamping block 31 by bolts. An insert 33 is integrally formed at the bottom of the stamping block 31. The locking die 4 includes a lower die plate body 42, the top of which is provided with a lower die cavity 43 via a rectangular spring. An inner groove 41 is formed in the center of the top of the lower die cavity 43. The strip is placed in the inner groove 41, and the insert 33 moves relative to it, locking and pressing the strip within the inner groove 41. The upper die fixing plate is mounted on the upper die plate and is driven by a cylinder. The upper die fixing plate drives the stamping block to move and cooperate with the locking die. The stamping block drives the insert to embed into the inner groove, and the insert and the inner groove press and squeeze the strip, causing it to bend.

[0029] One side of the inner groove 41 is open and serves as a material passage 411. A support block 44 is fixedly provided on the inner wall of the inner groove 41. The support block 44 is positioned opposite the material passage 411. A movable interval 412 is formed between one side of the support block 44 and the inner wall of the inner groove 41. A stop plate 413 is slidably disposed in the movable interval 412. A driving device on the inner wall of the movable interval 413 is drivenly connected to one side of the stop plate 413. The stop plate 413 moves and presses against the side wall of the support block 44. After the strip is placed into the inner groove, the stop plate is driven to move and press against one side of the strip, thereby pressing and locking the strip against the support block in the inner groove to prevent the strip from moving in the lateral direction and affecting the first bending process.

[0030] The bottom surface of the insert 33 is spaced apart from the bottom surface of the inner groove 41. A lifting support plate 45 is provided at the bottom of the inner groove 41, and the lifting support plate 45 is positioned corresponding to the material outlet 411. An installation hole 451 is provided on the bottom surface of the inner groove 41, and a spring 452 is installed in the installation hole 451. The top end of the spring 452 is fixed to the bottom surface of the lifting support plate 45. When the lifting support plate 45 is at the top of the inner groove 41, the lifting support plate 45 and the support block 44 are assembled to form a support platform 453. The strip is placed on the surface of the support platform 453 between the inner wall of the inner groove 41 and the side wall of the abutment plate 413, and is then laterally limited by the abutment plate 413 pressing against the strip. The width of the lifting support plate is smaller than the width of the strip. The lifting support plate is located in the middle area of ​​the strip. The lifting support plate and the support block are combined to form a support platform for placing the strip. It can keep the strip stable in the inner groove. Furthermore, the abutment plate ensures that the strip is not easy to move, thus providing good positioning. This allows the insert and the inner groove to cooperate in stamping and bending the strip.

[0031] The insert 33 has a fitting slot 331 at one bottom end, and the bottom cross-section of the insert 33 is S-shaped. When the insert 33 is embedded in the inner groove 41, the fitting slot 331 and the support block 44 cooperate to compress the strip. The end of the strip corresponding to the feed port 411 bends downward to abut against the lifting support plate 45 and descends to the bottom of the inner groove 41. The cross-section of the bent section 46 of the support block 44 and the fitting slot 331 is arc-shaped, thereby causing the strip to bend. When the fitting slot and the support block are fitted together, during the downward movement of the insert, the downward protruding end of the insert presses down on the part of the strip corresponding to the lifting support plate, thereby bending the strip and causing the part of the strip on the lifting support plate to fold downward. The gap between the support block and the fitting slot can compress and bend the strip, thereby completing the first bending forming process.

[0032] The support block 44 has a corresponding slot 441 on its surface. The inner wall of the fitting slot 331 has an embedding groove 332. The embedding groove 332 is provided with an elastic pressure block 333. The bottom end of the elastic pressure block 333 protrudes from the embedding groove 332. Multiple moving holes 334 are opened through the elastic pressure block 333. A rod 335 is provided in the moving hole 334. The driving rod 336 on the inner wall of the moving hole 334 is fixedly connected to the rod 335 by a telescopic spring 337. The driving rod 336 drives the rod 335 in and out of the moving hole 334 through the telescopic spring 337. The rod 335 extends out of the moving hole 334, passes through the positioning hole on the strip, and embeds into the corresponding slot 441, or the rod 335 extends out of the moving hole 334 and presses against the surface of the strip. The rod is segmented. The first segment of the rod presses against the surface of the strip to prevent it from warping. The second segment of the rod passes through the strip, thus ensuring that the strip remains in the corresponding slot position during the stamping process and preventing the strip from shifting. On the one hand, it can press down on the strip, and on the other hand, it can pass through the positioning hole of the strip to restrict and position it, preventing the strip from moving or warping during the stamping process and preventing breakage at the bend.

[0033] A sliding groove 47 is provided on the middle side wall of the support block 44. A transverse punch 5 is provided in the sliding groove 47. The transverse punch 5 includes a transverse punch block 51 and a telescopic rod 52. The transverse punch block 51 is embedded in the movable groove 47. A driving device on the inner wall of the sliding groove 47 is driven to one end of the telescopic rod 52. The other end of the telescopic rod 52 is fixedly connected to the transverse punch block 51. When the transverse punch block 51 is embedded in the sliding groove 47, the side wall of the transverse punch block 51 is flush with the side wall of the support block 44. A punch groove 511 is provided on the top of the transverse punch block 51. One side of the punch groove 511 is open, and the other side of the punch groove 511 has an arc-shaped cross section. When the transverse punch block 51 punches the strip, the bent part of the strip is in the punch groove 511, and the lifting support plate 45 rises and abuts against the bottom surface of the transverse punch block 51. After the first bending process is completed, the drive device drives the telescopic rod to extend the transverse punch out of the sliding groove. The transverse punch presses the side wall of the strip in the transverse direction, causing the strip to bend. The bent part of the strip is located between the bottom of the insert and the punch groove, thus completing the second bending. The strip forms a zigzag-shaped plate with an arc-shaped cross section at the bent part. During the bending of the strip, the support block, insert, and transverse punch continuously press against the side wall of the strip, reducing the stress caused by bending and preventing the strip from easily breaking.

[0034] A filling hole 6 is provided on the side wall of the support block 44, and the filling hole 6 is located between the top surface of the support block 44 and the sliding groove 47. A pushing structure 61 is provided in the filling hole 6, and the pushing structure 6 includes a pushing plate 62. The driving device in the filling hole 6 is driven and connected to one end of the pushing plate 62. The other end of the pushing plate 62 is connected to the filling hole 6. The top surface of the pushing plate 62 is spaced apart from the inner wall of the sliding groove 47. The side wall of the pushing plate 62 corresponds to the material passage 411 of the strip. An elastic cavity 63 is provided at the top of the end of the pushing plate 62 away from the driving device. The elastic cavity 63 is connected to the air chamber 64 through the air pipe 65 in the pushing plate 62. When the elastic cavity 63 enters the filling hole 6, the inner wall of the filling hole 6 compresses the elastic cavity and contracts. When the elastic cavity 63 extends out of the filling hole 6, the top of the elastic cavity 63 expands and the top of the elastic cavity 63 abuts against the bottom surface of the strip. After the strip is bent twice, the stamping block drives the insert to disengage from the inner groove. Then, the driving device drives the push plate to move the elastic cavity, which in turn pushes the formed plate out of the inner groove. The push plate then pushes against the side wall of the plate, causing the plate to slide along the punch groove. When the plate disengages from the punch groove, it falls downwards. The top of the plate, i.e., the part bent in the first bend, falls onto the surface of the elastic cavity. The elasticity of the elastic cavity itself reduces the impact between the bottom surface of the plate and the push plate, thus preventing the plate from being easily damaged by collision.

[0035] The bending and forming method is as follows: First, the strip is placed on the support platform 453, and then the abutment plate 413 moves to abut against the side wall of the strip, thereby limiting the strip in the lateral direction; after the strip on the support platform is clamped and limited in the lateral direction, the strip will not shift laterally in the lateral direction during the process of the insert pressing the strip downward, thus avoiding the phenomenon of outward slant at the bending point.

[0036] In the second step, the stamping block 31 drives the insert block 33 to move downward. When the insert block 33 contacts the surface of the strip, the drive rod 336 drives the telescopic spring 337 to drive the rod 335 to press down on the strip or the rod 335 passes through the positioning hole on the strip and is embedded in the corresponding slot 441, thereby limiting the strip vertically. First, the strip is limited in the horizontal direction, and then the rod cooperates with the support block to press the surface of the strip, thereby restricting the strip and preventing the strip from moving during the stamping and bending process, which would cause the bent part to be skewed outward.

[0037] In the third step, the insert 33 presses the strip downwards, and the support block 44 cooperates with the fitting groove 331 to bend the strip, causing the side wall of the strip to stick to the side wall of the support block 44. At the same time, the bent strip moves downwards against the lifting support plate 45. The lifting support plate supports the strip to prevent one end of the strip from easily lifting up. The downward protruding part of the insert presses the strip, and at the same time, the fitting groove cooperates with the support block to perform the first bending process on the strip.

[0038] In the fourth step, the driving device drives the transverse punch 51 to punch the strip in the transverse direction, causing the strip to bend into a zigzag shape. The strip is embedded in the corresponding punch groove 511. The lifting support plate 45 moves upward and abuts against the bottom surface of the transverse punch 51. After the first bend, the strip forms an inverted L-shape with a bend at the bend. Then, the punch performs a second punch bend on the bottom end of the strip, causing the strip to form a zigzag shape, thereby processing and forming a plate.

[0039] In the fifth step, after the stamping is completed, the stamping block 31 drives the insert block 33 to disengage from the inner groove 41. The driving device drives the push plate 62 to push the strip through the elastic cavity 63, causing the strip to move out of the inner groove 41 through the feed port 411. At the same time, when the strip disengages from the punch groove 511, it will move downwards, and the bent part at the top of the strip will move downwards to contact the elastic cavity 63, thereby reducing the collision between the strip and the push plate 62. After being processed by the second bending, the plate passes through the inner groove at the push plate, and the elastic cavity provides a buffer force when the plate falls, reducing the degree of damage to the plate due to collision.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, several improvements and changes can be made without departing from the above principles of the present invention, and these improvements and changes are also considered to be within the scope of protection of the present invention.

Claims

1. A bending and forming mold for inner plates of a wind turbine housing, characterized in that: It includes a mating punch (3) and a snap-fit ​​die (4) that are configured to cooperate with each other. The inner groove (41) of the snap-fit ​​die (4) and the stamping block (31) of the mating punch (3) cooperate with each other to stamp and bend one end of the strip. A transverse punch (5) is provided on one side of the inner groove (41). The transverse punch (5) performs transverse stamping on the bent end of the strip, causing the strip to form a zigzag-shaped bent mounting plate. The mating punch (3) includes an upper die fixing plate (32), the bottom of which is fixed with a stamping block (31) by bolts, and the bottom of the stamping block (31) is integrally provided with an insert (33); the snap-fit ​​die (4) includes a lower die plate body (42), the top of which is provided with a lower die cavity (43) by a rectangular spring, and the top center of the lower die cavity (43) has an inner groove (41); the strip is placed in the inner groove (41), and the insert (33) moves relative to the strip and is snapped into the inner groove (41) and pressed against the strip; One side of the inner groove (41) is open and configured as a material passage (411). A support block (44) is fixedly provided on the inner wall of the inner groove (41). The support block (44) is positioned opposite the material passage (411). An active range (412) is formed between one side of the support block (44) and the inner wall of the inner groove (41). A stop plate (413) is slidably provided in the active range (412). A driving device on the inner wall of the active range (412) is drivenly connected to one side of the stop plate (413). The stop plate (413) moves and presses against the side wall of the support block (44). The bottom surface of the insert (33) is spaced apart from the bottom surface of the inner groove (41). A lifting support plate (45) is provided at the bottom of the inner groove (41). The lifting support plate (45) is positioned corresponding to the material outlet (411). An installation hole (451) is provided on the bottom surface of the inner groove (41). A spring (452) is installed in the installation hole (451). The top of the spring (452) is fixed to the bottom surface of the lifting support plate (45). When the lifting support plate (45) is at the top of the inner groove (41), the lifting support plate (45) and the support block (44) are assembled to form a support platform (453). The strip is placed on the surface of the support platform (453) between the inner wall of the inner groove (41) and the side wall of the abutment plate (413). The abutment plate (413) then presses against the strip to limit its lateral movement. The insert (33) has a fitting groove (331) at one end of its bottom, and the bottom surface of the insert (33) is S-shaped. When the insert (33) is embedded in the inner groove (41), the fitting groove (331) and the support block (44) cooperate to squeeze the strip. The end of the strip corresponding to the feed port (411) bends downward to abut against the lifting support plate (45) and descends to the bottom of the inner groove (41). The cross section of the bent section (46) of the support block (44) and the fitting groove (331) is arc-shaped, thereby causing the strip to bend.

2. The bending and forming mold for the inner plate of a wind power generation nacelle according to claim 1, characterized in that: The support block (44) has a corresponding slot (441) on its surface. The inner wall of the fitting slot (331) has an embedding slot (332). The embedding slot (332) is provided with an elastic pressure block (333). The bottom end of the elastic pressure block (333) protrudes from the embedding slot (332). The elastic pressure block (333) has multiple moving holes (334) through it. The moving holes (334) are provided with rods (335). The driving rod (336) on the inner wall of the moving hole (334) is fixedly connected to the rod (335) by a telescopic spring (337). The driving rod (336) drives the rod (335) to enter and exit the moving hole (334) by the telescopic spring (337). The rod (335) extends out of the moving hole (334) and passes through the positioning hole on the strip to embed into the corresponding slot (441), or the rod (335) extends out of the moving hole (334) and presses against the surface of the strip.

3. The bending and forming mold for the inner plate of a wind power generation silo according to claim 2, characterized in that: A sliding groove (47) is provided on the middle side wall of the support block (44). A transverse punch (5) is provided in the sliding groove (47). The transverse punch (5) includes a transverse punch block (51) and a telescopic rod (52). The transverse punch block (51) is embedded in the sliding groove (47). A driving device on the inner wall of the sliding groove (47) is driven to one end of the telescopic rod (52). The other end of the telescopic rod (52) is fixedly connected to the transverse punch block (51). 51) When embedded in the sliding groove (47), the side wall of the transverse punch (51) is flush with the side wall of the support block (44); the top of the transverse punch (51) is provided with a punch groove (511), one side of the punch groove (511) is open, and the other side of the punch groove (511) has an arc-shaped cross section; when the transverse punch (51) punches the strip, the bent part of the strip is in the punch groove (511), and the lifting support plate (45) rises and abuts against the bottom surface of the transverse punch (51).

4. The bending and forming mold for the inner plate of a wind turbine housing according to claim 3, characterized in that: A filling hole (6) is provided on the side wall of the support block (44), and the filling hole (6) is located between the top surface of the support block (44) and the sliding groove (47); a pushing structure (61) is provided in the filling hole (6), the pushing structure (61) includes a pushing plate (62), the driving device in the filling hole (6) is driven connected to one end of the pushing plate (62), the other end of the pushing plate (62) enters and exits the filling hole (6), the top surface of the pushing plate (62) is spaced from the inner wall of the sliding groove (47), and the pushing plate (62) is... The side wall of the push plate (62) is connected to the abutment strip through the feed port (411); the top of the push plate (62) away from the drive device is provided with an elastic cavity (63), the elastic cavity (63) is connected to the air chamber (64) through the air pipe (65) in the push plate (62); when the elastic cavity (63) enters the filling hole (6), the inner wall of the filling hole (6) squeezes the elastic cavity to contract; when the elastic cavity (63) extends out of the filling hole (6), the top of the elastic cavity (63) expands, and the top of the elastic cavity (63) abuts the bottom surface of the strip.

5. A bending forming method for a bending forming die for a wind turbine housing inner plate according to any one of claims 1-4, characterized in that, The bending and forming method is as follows: First step, the strip is placed on the support platform (453), and then the abutment plate (413) moves to abut against the side wall of the strip, thereby limiting the lateral movement of the strip; In the second step, the stamping block (31) drives the insert (33) to move downward. When the insert (33) contacts the surface of the strip, the driving rod (336) drives the telescopic spring (337) to drive the rod (335) to press down on the strip or the rod (335) passes through the positioning hole on the strip and is embedded in the corresponding slot (441), thereby limiting the strip in the vertical direction. In the third step, the insert (33) presses the strip downward, and the support block (44) cooperates with the fitting groove (331) to bend the strip, causing the side wall of the strip to stick to the side wall of the support block (44). At the same time, the bent strip abuts against the lifting support plate (45) and moves downward. In the fourth step, the driving device drives the transverse punch (51) to punch the strip in the transverse direction, causing the strip to bend into a zigzag shape. The strip is embedded in the corresponding punch groove (511), and the lifting support plate (45) moves upward to abut against the bottom surface of the transverse punch (51). In the fifth step, after the stamping is completed, the stamping block (31) drives the insert (33) to disengage from the inner groove (41), and the driving device drives the push plate (62) to push the strip through the elastic cavity (63), causing the strip to move out of the inner groove (41) through the feed port (411); at the same time, when the strip disengages from the punch groove (511), the strip will move downward, and the bent part at the top of the strip will move downward to contact the elastic cavity (63), thereby reducing the collision between the strip and the push plate (62).

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