A progressive die for forming multiple sub-sheets of an integral corrugated sheet

Abstract

The present invention provides a progressive die for forming a multi-sub-sheet of an integral corrugated sheet, comprising an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper die base, a discharge plate and a punch fixing plate fixedly connected to the lower end surface of the upper die base, and the lower die assembly comprises a lower die base, a die pad and a die fixing plate fixedly connected to the top of the die pad; a plurality of workstations are correspondingly arranged between the punch fixing plate and the die fixing plate, which are respectively from left to right in processing order: a first punching station, a first blanking station, a second blanking station, a first forming station, a second forming station, a second punching station and a third blanking station, thereby streamlining the mold and reducing the processing cost, and achieving the goal of large-scale continuous stamping of integral corrugated sheets with a single set of molds.

Description

Technical Field

[0001] The invention relates to the field of auto parts stamping, and in particular to a multi-sub-sheet forming progressive die for an integral corrugated sheet. Background Art

[0002] The corrugated plate is a key component of the driven plate of the automobile clutch. The corrugated plate can be divided into integral type and single-piece type according to the sub-piece connection method. The sub-pieces of the integral corrugated plate are connected into a whole through the middle circular area. The structure of the integral corrugated plate is relatively complex and the processing steps are cumbersome. At present, the molds for processing single-piece corrugated plates are mostly single-process molds, which are inefficient and not suitable for integral corrugated plates. In order to improve the forming efficiency of integral corrugated plates, compound molds and progressive molds are generally used for processing. However, due to the limitations of the structure and size of the corrugated plate, the structure of the compound mold is complex, and the manufacturing and maintenance costs are high. Summary of the invention

[0003] In order to solve the problems in the background technology, the present invention proposes a progressive die for forming a multi-sub-sheet of an integral corrugated sheet, comprising an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper die base, a discharge plate and a punch fixing plate fixedly connected to the lower end surface of the upper die base, and the lower die assembly comprises a lower die base, a die pad and a die fixing plate fixedly connected to the top of the die pad; a plurality of workstations are correspondingly arranged between the punch fixing plate and the die fixing plate, which are respectively from left to right in the processing order: a first punching station, a first blanking station, a second blanking station, a first forming station, a second forming station, a second punching station, and a third blanking station.

[0004] Preferably, at the first punching station, the punch fixing plate is provided with a first punching punch, and the die fixing plate is correspondingly provided with a first punching die. Between the first blanking station and the second blanking station, the punch fixing plate is provided with a first punch insert, and the first punch insert is provided with a first blanking punch. The first punching punch is also provided on the first punch insert. The die fixing plate is provided with a first die insert, and the first die insert is provided with a first blanking die. The first punching die is also provided on the first die insert. At the first forming station, the punch fixing plate is provided with a first forming die. The first forming die insert is provided on the die fixing plate; the second forming die insert is provided on the die fixing plate; the second forming die insert is provided on the die fixing plate; the second forming die insert is provided on the die fixing plate; the second punching die is provided on the second punching station; the second punching die is provided on the die fixing plate; the second punching die is provided on the die fixing plate; the third blanking station; the second die insert is provided on the die fixing plate; the second die insert is provided on the second blanking die; the second die insert is provided on the second blanking die.

[0005] Preferably, the unloading plate is located below the punch fixing plate, the die pad is located between the lower die base and the die fixing plate, and the first punching punch, the first blanking punch, the first forming punch insert, the second forming punch insert, and the second punching punch are all fixedly connected to the punch fixing plate through the unloading plate.

[0006] Preferably, the punch fixing plate is provided with guide pins, the unloading plate is provided with a plurality of guide holes, the die fixing plate is provided with a plurality of guide holes and guide pins, the guide pins pass through the punch fixing plate, the unloading plate and are connected with the guide holes, the guide pins are connected with the guide holes, and the guide pins are provided with an annular groove.

[0007] Preferably, a spring push rod is provided on the upper die base, and the spring push rod passes through the upper die base, the punch fixing plate and is fixedly connected to the unloading plate.

[0008] Preferably, the upper mold assembly further comprises an upper cover plate, the lower end surface of the upper cover plate is in fixed contact with the top of the upper mold base, and a mold handle is provided in the middle of the top end surface of the upper cover plate.

[0009] Preferably, the lower die assembly further comprises a supporting block, which is arranged on the upper end surface of the lower die base, and the right end surface of the supporting block is in contact with the die pad and one end of the die fixing plate.

[0010] Preferably, a supporting push rod is provided on the supporting block, the lower end of the supporting push rod is connected to the supporting block via a second spring, and the upper end surface is in contact with the lower end surface of the material plate.

[0011] Preferably, the multi-sub-sheet forming progressive die of the integral corrugated sheet also includes a guide device, which includes an outer guide pin, an outer guide pin sleeve, an inner guide pin and an inner guide pin sleeve, the outer guide pin is fixedly connected to the upper cover plate, the outer guide pin sleeve is fixedly connected to the lower die base, the inner guide pin is fixed to the punch fixing plate and passes through the unloading plate, and the inner guide pin sleeve is fixedly connected to the die fixing plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) By integrating the blanking, forming and punching processes of the integral corrugated sheet into a set of dies, the dies are simplified and the processing costs are reduced, so that the goal of large-scale continuous stamping of integral corrugated sheets with a single set of dies can be achieved; at the same time, by using multiple forming inserts to process multiple sub-sheets at the same time, the errors caused by multiple positioning are reduced, the low efficiency of multiple operations by workers is improved, and the stamping of multiple sub-sheets is achieved at the same time, so that the forming quality and efficiency of the integral corrugated sheet are greatly improved.

[0014] (2) The progressive die is integrated with the insert by using the mold, and the insert is then connected to the template and the pad by bolts, so that the punch and the die can be separated, which reduces the difficulty of mold manufacturing, assembly and maintenance.

[0015] (3) The progressive die also uses an elastic unloading plate structure to automatically adjust the blank holding force and unload the material, thereby reducing the stamping failure rate and improving the forming quality.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the corrugated sheet.

[0018] Figure 2 is a schematic structural diagram of an upper mold assembly according to an embodiment of the present invention;

[0019] Figure 3 is a structural schematic diagram of a lower mold assembly according to an embodiment of the present invention;

[0020] Figure 4 is a mold assembly diagram according to one embodiment of the present invention;

[0021] Figure 5 is a diagram of an integrated corrugated sheet arrangement according to an embodiment of the present invention;

[0022] Figure 6 is a schematic structural diagram of a guide pin according to an embodiment of the present invention;

[0023] Wherein: 1 upper die seat; 101 spring push rod; 102 spring hole; 103 first spring; 2 punch fixing plate; 21 first punch insert; 201 first punch 201; 202 first blanking punch; 203 first forming punch insert; 207 second forming punch insert; 211 second punching punch; 22 second punch insert; 212 second blanking punch; 3 lower die seat; 4 die fixing plate; 41 first die insert; 401 first punching die; 402 first blanking die; 403 first forming die insert; 407 second forming die insert; 4 11 second punching die; 42 second die insert; 412 second blanking die; 413 guide pin; 5 first punching station; 6 first blanking station; 7 second blanking station; 8 first forming station; 9 second forming station; 10 second punching station; 11 third blanking station; 12 upper cover plate; 121 die handle; 13 unloading plate; 131 guide pin; 132 guide hole; 14 die pad; 151 outer guide post; 152 outer guide post sleeve; 161 inner guide post; 162 inner guide post sleeve; 17 support block; 171 support ejector rod; 172 second spring; 18 material plate; DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Refer to the following Figures 1 to 6 A progressive die for forming multiple sub-sheets of an integral corrugated sheet according to some embodiments of the present invention is described.

[0026] Example 1: Figures 1 to 5 As shown, the present invention provides a progressive die for forming a multi-sub-sheet of an integral corrugated sheet, comprising an upper die assembly and a lower die assembly, the upper die assembly comprising an upper die base 1, a discharge plate 13 and a punch fixing plate 2 fixedly connected to the lower end surface of the upper die base 1, the lower die assembly comprising a lower die base 3, a die pad 14 and a die fixing plate 4 fixedly connected to the top of the die pad 14; a plurality of workstations are correspondingly arranged between the punch fixing plate 2 and the die fixing plate 4, which are respectively: a first punching station 5, a first blanking station 6, a second blanking station 7, a first forming station 8, a second forming station 9, a second punching station 10, and a third blanking station 11 from left to right in processing order.

[0027] In this embodiment, the multi-sub-sheet forming progressive die of the integral corrugated sheet includes an upper die assembly and a lower die assembly, the upper die assembly includes an upper die base 1, a discharge plate 13, and a punch fixing plate 2 which is in close contact with and fixedly connected to the lower end face of the upper die base 1. In specific operation, the countersunk bolts on the upper die base 1 pass through the upper die base 1 and cooperate with the internal tapped blind holes on the punch fixing plate 2, so that the lower end face of the upper die base 1 is connected to the punch fixing plate 2; the lower die assembly includes a lower die base 3, a die pad 14, and a die fixing plate 4 which is in close contact with and fixedly connected to the upper end face of the die pad 14. In specific operation, the countersunk bolts on the die fixing plate 4 pass through the die fixing plate 4 and cooperate with the internal tapped blind holes on the die pad 14, so that the upper end face of the die pad 14 It is connected to the die fixing plate 4; a plurality of workstations are correspondingly arranged between the punch fixing plate 2 and the die fixing plate 4, and are respectively as follows from left to right in the processing order: the first punching station 5, the first blanking station 6, the second blanking station 7, the first forming station 8, the second forming station 9, the second punching station 10, and the third blanking station 11. The first punching station 5 punches out holes in the middle connecting area of ​​the integral corrugated sheet for subsequent positioning, the first blanking station 6 completes the forming processing of the middle area and the right edge part of the integral corrugated sheet, and the second blanking station 7 completes the forming processing of the left edge part of the integral corrugated sheet, and the outline of the integral corrugated sheet is roughly formed here. In this embodiment, the distance between adjacent workstations is 220mm, and the sheet width is 220mm.

[0028] Embodiment 2: In the first punching station 5, the punch fixing plate 2 is provided with a first punching punch 201, and the die fixing plate 4 is correspondingly provided with a first punching die 401. Between the first blanking station 6 and the second blanking station 7, the punch fixing plate 2 is provided with a first punch insert 21, and the first punch insert 21 is provided with a first blanking punch 202. The first punching punch 201 is also provided on the first punch insert 21, and the die fixing plate 4 is provided with a first die insert 41, and the first die insert 41 is provided with a first blanking die 402. The first punching die 401 is also provided on the first die insert 41. In the first forming station 8, the punch fixing plate 2 is provided with a first forming punch insert Block 203, a first forming die insert 403 is correspondingly provided on the die fixing plate 4, in the second forming station 9, a second forming die insert 207 is provided on the punch fixing plate 2, and a second forming die insert 407 is correspondingly provided on the die fixing plate 4, in the second punching station 10, a second punching punch 211 is provided on the punch fixing plate 2, and a second punching die 411 is correspondingly provided on the die fixing plate 4, in the third blanking station 11, a second punch insert 22 is provided on the punch fixing plate 2, and a second die insert 42 is provided on the die fixing plate 4, a second blanking punch 212 is provided on the second punch insert 22, and a second blanking die 412 is correspondingly provided on the second die insert 42.

[0029] In this embodiment, at the first punching station 5, a first punching punch 201 is provided on the punch fixing plate 2, and a first punching die 401 is correspondingly provided on the die fixing plate 44; between the first blanking station 6 and the second blanking station 7, a first punch insert 21 is provided on the punch fixing plate 2, a first blanking punch 202 is provided on the first punch insert 21, and the first punching punch 201 is also provided on the first punch insert 21; a first die insert 41 is provided on the die fixing plate 4, a first blanking die 402 is provided on the first die insert 41, and the first punching die 401 is also provided on the first die insert 41. In the first forming station 8, a first forming punch insert 203 is provided on the punch fixing plate 2, and a first forming die insert 403 is correspondingly provided on the die fixing plate 4, a total of four, which are distributed at an interval of 90°; in the second forming station 9, a second forming punch insert 207 is provided on the punch fixing plate 2, and a second forming die insert 407 is correspondingly provided on the die fixing plate 4, a total of four, which are distributed at an interval of 90°; in the second punching station 10, a second punching punch 211 is provided on the punch fixing plate 2, and a second punching die 411 is correspondingly provided on the die fixing plate 4. Since there are 16 holes in the eight sub-sheets, there are 16 second punching punches 211 and second punching dies 411 respectively; in the third blanking station 11, a second punch insert 206 is provided on the punch fixing plate 2, and a second punch insert 407 is provided on the die fixing plate 4, and a total of four, which are distributed at an interval of 90°; in the second punching station 10, a second punching punch 211 is provided on the punch fixing plate 2, and a second punching die 411 is provided on the die fixing plate 4. Since there are 16 holes in total in the eight sub-sheets, there are 16 second punching punches 211 and second punching die 411 respectively; in the third blanking station 11, a second punch insert 207 is provided on the punch fixing plate 2, and a second punch insert 407 is provided on the die fixing plate 4, and a total of four, which are distributed at an interval of 90° 22, the die fixing plate 4 is provided with a second die insert 42, the second die insert 22 is provided with a second blanking die 212, the second die insert 42 is provided with a second blanking die 412, the first blanking die 202 and the first blanking die 402 are used for integral corrugated shape forming, and their shapes are consistent with the outline of the integral corrugated sheet, the first forming die insert 203 and the second forming die insert 207 have a wavy curved surface at the bottom, the first forming die insert 403 and the second forming die insert 407 have a wavy curved surface at the top, which is consistent with the curved surface of the sub-sheet of the integral corrugated sheet, and the two groups of forming inserts are 4 in each group, and the shapes are exactly the same, but the eight sub-sheets of the integral corrugated sheet are stamped and formed twice at an angle of 45 degrees. The second blanking die 212 and the second blanking die 412 are used to cut off the excess part of the edge of the integral corrugated sheet, so that the product can fall off the material belt.

[0030] Example 3: Figures 1 to 5 As shown, the unloading plate 13 is located below the punch fixing plate 2, the die pad 14 is located between the lower die base 3 and the die fixing plate 4, and the first punching punch 201, the first blanking punch 202, the first forming punch insert 203, the second forming punch insert 207, and the second punching punch 211 are all fixedly connected to the punch fixing plate 2 through the unloading plate 13.

[0031] In this embodiment, the unloading plate 13 is located below the punch fixing plate 2, the die pad 14 is located between the lower die base 3 and the die fixing plate 4, the first punching punch 201, the first blanking punch 202, the first forming punch insert 203, the second forming punch insert 207, and the second punching punch 211 all pass through the unloading plate 13 and are fixedly connected to the punch through a bolt fixing plate.

[0032] Example 4: Figure 6 As shown, a guide pin 131 is provided on the punch fixing plate 2, a plurality of guide holes 132 are provided on the stripping plate 13, a plurality of guide holes and a guide pin 413 are provided on the die fixing plate 4, the guide pin 131 passes through the punch fixing plate 2 and the stripping plate 13 and is connected with the guide hole, the guide pin 413 is connected with the guide hole 132, and an annular groove is provided on the guide pin 413.

[0033] Embodiment 5: A spring push rod 101 is provided on the upper die base 1 , and the spring push rod 101 passes through the upper die base 1 , the punch fixing plate 2 and is fixedly connected with the unloading plate 13 .

[0034] In this embodiment, a spring push rod 101 is provided on the upper die base 1, and the spring push rod 101 passes through the upper die base 1, the punch fixing plate 2 and is connected with the unloading plate 13. In specific operations, the unloading plate 13 can be fixed by an upward countersunk bolt on the unloading plate 13 and an internal tapped blind hole located on the lower end surface of the spring push rod 101. A spring hole 102 is provided on the upper die base 1, and a first spring 103 is arranged inside. The lower end of the spring push rod 101 contacts the top of the spring push rod 101 to adjust the position of the unloading plate 13.

[0035] Example 6: Figure 2 As shown, the upper mold assembly further includes an upper cover plate 12 , the lower end surface of the upper cover plate 12 is fixedly contacted with the top of the upper mold base 1 , and a mold handle 121 is provided in the middle of the top end surface of the upper cover plate 12 .

[0036] Example 7: Figure 3 As shown, the lower die assembly further includes a supporting block 17 , which is disposed on the upper end surface of the lower die base 3 , and the right end surface of the supporting block 17 contacts the die pad 14 and one end of the die fixing plate 4 .

[0037] In this embodiment, the lower die assembly further includes a support block 17, which is located at the left end of the first punching station 5, and its right end surface is in contact with the left end surface of the die fixing plate 4 and the die pad 14, and is fixed to the upper end surface of the lower die base 3 by bolts.

[0038] Embodiment 8: A supporting push rod 171 is provided on the supporting block 17 , the lower end of the supporting push rod 171 is connected to the supporting block 17 via a second spring 172 , and the upper end surface is in contact with the lower end surface of the material plate 18 .

[0039] In this embodiment, the support block 17 is provided with a support push rod 171, the lower part of which is in contact with the second spring 172 inside the support block 17, and the upper end surface is in contact with the lower end of the material plate 18, and together with the guide pin 413, the feeding accuracy is ensured. The material plate is the working object of the multi-sub-sheet forming progressive die of the integral corrugated sheet.

[0040] Example 9: The progressive die for forming multiple sub-sheets of an integral corrugated sheet also includes a guide device, which includes an outer guide pin 151, an outer guide pin sleeve 152, an inner guide pin 161 and an inner guide pin sleeve 162. The outer guide pin 151 is fixedly connected to the upper cover plate 12, the outer guide pin sleeve 152 is fixedly connected to the lower die base 3, the inner guide pin 161 is fixed to the punch fixing plate 2 and passes through the unloading plate 13, and the inner guide pin sleeve 162 is fixedly connected to the die fixing plate 4.

[0041] In this embodiment, the guide device includes an outer guide post 151, an outer guide post sleeve 152, an inner guide post 161 and an inner guide post sleeve 162. The outer guide post 151 is fixedly connected to the upper cover plate 12 by interference fit, the outer guide post sleeve 152 is fixedly connected to the lower die seat 3 by interference fit, the inner guide post 161 is connected to both the punch fixing plate 2 and the unloading plate 13, and the inner guide post sleeve 162 is fixedly connected to the die fixing plate 4 by interference fit. In order to ensure the guiding accuracy, the guide posts and guide sleeves are provided with 6 sets in total, which are evenly distributed on the upper cover plate 12 and the upper die seat 1. In addition, guide pins 413 are provided on the die fixing plate 4, two in each group, a total of three groups, and the materials are symmetrically distributed on both sides to ensure the correct transportation of the materials and improve the forming accuracy of the integral corrugated sheet.

[0042] The present invention is introduced below in combination with specific use. The entire progressive die is divided into a first punching station 5, a first blanking station 6, a second blanking station 7, a first forming station 8, a second forming station 9, a second punching station 10, and a third blanking station 11 from left to right in processing order.

[0043] First punching station: First, before the material plate 18 reaches the first punching station 5, it is in close contact with the top horizontal surface of the support block 17, and the lower part is in contact with the top plane of the four support spring push rods 101 at the same time; a guide pin 413 is also provided on the die fixing plate 4, and there is an annular cutout 413-1 on the guide pin 413, and the material plate 18 is in contact with the annular cutout 413-1. The above method enables the material plate 18 to have a higher position accuracy during the stamping process.

[0044] At the first punching station 5, the press machine connects the die handle 121 to transfer the punching force to the upper die assembly to press it down. When the upper die assembly presses down, the first thing that contacts the material plate 18 is the stripper plate 13. After the stripper plate 13 contacts the material, the clamping force gradually increases under the action of the spring push rod 101, pressing the material plate to prevent warping during the forming process. The spring push rod 101 contracts, so that the first punching punch 201 is exposed relative to the stripper plate 13, and a positioning hole is punched out on the material plate 18. After the positioning hole is punched, during the return stroke of the upper die assembly, the material plate 18 returns to the original position under the action of the elastic guide pin 413, and the material plate 18 reaches the first blanking station 6 and the second blanking station 7.

[0045] First blanking station, second blanking station: When the upper die assembly is pressed down, the first thing that contacts the material plate is the discharge plate 13. After the discharge plate contacts the material, the spring push rod 101 contracts, so that the first punch insert 21 is exposed relative to the discharge plate 13, and the first blanking punch 202 on it contacts the first blanking die 402 on the first die insert 41, and the material plate 18 is blanked; the material plate is roughly formed in shape, with eight evenly distributed sub-pieces, of which the upper and lower sub-pieces are partially still connected to the material plate to provide translational force. After the blanking is completed, the upper die assembly returns, and the material plate returns to the original position under the action of the elastic guide pin 413, and the blanked material plate 18 reaches the first forming station 8 and the second forming station 9.

[0046] First and second forming stations: When the upper die assembly is pressed down, the guide pin 131 first contacts the positioning hole punched out by the first punching station, so that the material plate reaches the accurate forming position. Then the unloading plate 13 is pressed down to press the material plate, and then the first forming convex mold insert 203 and the second forming convex mold insert 207 are relatively exposed, and work together with the first forming concave mold insert 403 and the second forming concave mold insert 407 to punch and form the blanked material. The eight sub-pieces are formed twice, and 4 sub-pieces are formed at intervals in the first forming station. The inserts of the second forming station are rotated 45° compared to the first forming station. After the forming is completed, during the return process of the upper die assembly, the material plate returns to the original position under the action of the elastic guide pin 413 and moves to the right to reach the second punching station 10.

[0047] Second punching station: when the upper die assembly is pressed down, the guide pin 131 first contacts the positioning hole to adjust the position of the sheet. After the unloading plate 13 presses the material, the second punching punch 211 moves down to punch eight sub-sheets of the material, a total of 16 punching punches.

[0048] After the punching operation is completed, during the return process of the upper die assembly, the material plate returns to the original position under the action of the elastic guide pins 413 and moves to the right to reach the third blanking station 11.

[0049] The third blanking station: At the third blanking station, when the upper die assembly is pressed down, the guide pin 131 adjusts the position of the sheet material, and at the same time, the unloading plate 13 moves down to press the material. The second blanking punch 212 works together with the second blanking die 412 as the unloading plate moves down to cut off the upper and lower sub-sheets of the material and the connection part of the material plate. The cut-off corrugated sheet naturally falls to the storage place under the action of the inclined surface at the rightmost end of the die fixing plate 4. At this point, the processing of the integral corrugated sheet is completed. Repeating the above operations can realize continuous processing of the integral corrugated sheet, greatly improve the processing efficiency of the integral corrugated sheet, and reduce production costs.

[0050] The above embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention. Based on the above embodiments, all other embodiments obtained by those skilled in the art without creative work, that is, all modifications, equivalent substitutions and improvements made within the spirit and principles of this application, fall within the protection scope of the present invention.

Claims

1. A progressive die for forming multiple sub-sheets of an integral corrugated sheet, characterized in that: It comprises an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper die seat, a stripper plate and a punch fixing plate fixedly connected to the lower end surface of the upper die seat, and the lower die assembly comprises a lower die seat, a die pad and a die fixing plate fixedly connected to the top of the die pad; a plurality of stations are arranged between the punch fixing plate and the die fixing plate, which are respectively: a first punching station, a first blanking station, a second blanking station, a first forming station, a second forming station, a second punching station, and a third blanking station from left to right in processing order; At the first punching station, the punch fixing plate is provided with a first punching punch, and the die fixing plate is correspondingly provided with a first punching die. Between the first blanking station and the second blanking station, the punch fixing plate is provided with a first punch insert, and the first punch insert is provided with a first blanking punch, and the first punching punch is also provided on the first punch insert. The die fixing plate is provided with a first die insert, and the first die insert is provided with a first blanking die, and the first punching die is also provided on the first die insert. At the first forming station, a first forming convex mold insert is provided on the convex mold fixing plate, and a first forming concave mold insert is correspondingly provided on the concave mold fixing plate; at the second forming station, a second forming convex mold insert is provided on the convex mold fixing plate, and a second forming concave mold insert is correspondingly provided on the concave mold fixing plate; at the second punching station, a second punching convex is provided on the convex mold fixing plate, and a second punching concave is correspondingly provided on the concave mold fixing plate; at the third blanking station, a second convex mold insert is provided on the convex mold fixing plate, and a second concave mold insert is provided on the concave mold fixing plate; a second blanking convex is provided on the second convex mold insert, and a second blanking concave is correspondingly provided on the second concave mold insert; The first blanking punch and the first blanking die are used for forming the shape of the integral corrugated sheet, and their shapes are consistent with the contour of the integral corrugated sheet. The first forming punch insert and the second forming punch insert have wavy surfaces at the bottom, and the first forming die insert and the second forming die insert have wavy surfaces at the top, which are consistent with the surfaces of the sub-sheets of the integral corrugated sheet. There are 4 forming inserts in each group, and the shapes are exactly the same, but they are staggered by 45° and the eight sub-sheets of the integral corrugated sheet are stamped and formed in two times; the second blanking punch and the second blanking die are used to cut off the excess part of the edge of the integral corrugated sheet.

2. The progressive die for forming a multi-sub-sheet integral corrugated sheet according to claim 1, characterized in that: The stripping plate is located below the punch fixing plate, the die pad is located between the lower die seat and the die fixing plate, and the first punching punch, the first blanking punch, the first forming punch insert, the second forming punch insert, and the second punching punch are all fixedly connected to the punch fixing plate through the stripping plate.

3. The progressive die for forming multiple sub-sheets of an integral corrugated sheet according to claim 2, characterized in that: The punch fixing plate is provided with guide pins, the stripping plate is provided with a plurality of guide holes, the die fixing plate is provided with a plurality of guide holes and guide pins, the guide pins pass through the punch fixing plate, the stripping plate and are connected with the guide holes, the guide pins are connected with the guide holes, and an annular groove is provided on the guide pins.

4. The progressive die for forming multiple sub-sheets of an integral corrugated sheet according to claim 1, characterized in that: The upper die seat is provided with a spring push rod, which passes through the upper die seat, the punch fixing plate and is fixedly connected with the unloading plate.

5. The progressive die for forming multiple sub-sheets of an integral corrugated sheet according to claim 4, characterized in that: The upper mold assembly also includes an upper cover plate, the lower end surface of the upper cover plate is fixedly contacted with the top of the upper mold base, and a mold handle is provided in the middle of the top end surface of the upper cover plate.

6. The progressive die for forming multiple sub-sheets of an integral corrugated sheet according to claim 1, characterized in that: The lower die assembly also includes a supporting block, which is arranged on the upper end surface of the lower die base, and the right end surface of the supporting block is in contact with the die pad and one end of the die fixing plate.

7. The progressive die for forming multiple sub-sheets of an integral corrugated sheet according to claim 6, characterized in that: The supporting block is provided with a supporting push rod, the lower end of the supporting push rod is connected to the supporting block through a second spring, and the upper end surface is in contact with the lower end surface of the material plate.

8. The progressive die for forming multiple sub-sheets of an integral corrugated sheet according to claim 5, characterized in that: It also includes a guiding device, which includes an outer guide pin, an outer guide pin sleeve, an inner guide pin and an inner guide pin sleeve, the outer guide pin is fixedly connected to the upper cover plate, the outer guide pin sleeve is fixedly connected to the lower die seat, the inner guide pin is fixed to the punch fixing plate and passes through the unloading plate, and the inner guide pin sleeve is fixedly connected to the die fixing plate.

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