Springback restraining mechanism and forming equipment

Abstract

The utility model provides a springback restraining mechanism which is used for restraining springback of a bending part, the bending part comprises a body and a first bending part and a second bending part which are connected with the body, the first bending part and the second bending part are perpendicular to the body and extend in the same direction, the springback restraining mechanism comprises two push-pull modules which are symmetrically arranged, and each push-pull module comprises a push-pull mechanism. The push-pull mechanism comprises a gear, a rack and a clamping piece. The rack is meshed with the gear, the rack is provided with a guide groove, the guide groove comprises a first part and a second part communicated with the first part, and the extension direction of the first part is different from that of the second part. The clamping piece is movably connected with the rack and comprises a clamping plate and a guide column arranged on the clamping plate, the clamping plate is provided with a through hole and a clamping groove, the guide column penetrates through the through hole and is movably inserted into the guide groove, and the clamping groove is configured to be connected with the first bent portion and the second bent portion in a clamped mode. In addition, the utility model further provides forming equipment.

Description

Technical Field

[0001] This application relates to the field of molding technology, and in particular to a springback suppression mechanism and molding equipment having the springback suppression mechanism. Background Technology

[0002] After a sheet metal is stamped into a bent part using a die, the bent part will exhibit springback after demolding. Springback refers to the elastic recovery of the bent part after it is released from the die constraint, resulting in a reduction in its bending angle and a deviation in its shape.

[0003] Traditional methods for addressing springback in bent parts employ a two-stage shaping process. First, a first set of fixtures over-bends the part, reducing the bending angle to below the designed theoretical angle, thus artificially introducing reverse stress. Then, a second set of fixtures corrects the bending, pushing the bending angle back to the design value. This two-stage shaping process effectively releases residual stress, ensuring the dimensional stability of the final product.

[0004] However, the traditional method requires the use of two sets of fixtures alternately, which not only affects the improvement of production efficiency, but also easily leads to problems such as confusion in fixture use and confusion in the processing of bent parts. Utility Model Content

[0005] In view of the above, this application provides a springback suppression mechanism, which symmetrically arranges two push-pull modules. Each push-pull module includes a push-pull mechanism, which includes a gear, a rack meshing with the gear, and locking members. The rack has guide grooves for the insertion of a first bending portion and a second bending portion. The guide grooves have a first portion and a second portion extending in different directions, so that when the rack is driven by the gear, the two locking members apply opposing or opposite forces to the first bending portion and the second bending portion, allowing the first bending portion and the second bending portion to bend relative to the body. For example, firstly, the two locking members drive the first bending portion and the second bending portion to move towards each other, so that the first bending portion and the second bending portion move closer to each other from their initial positions, thereby introducing reverse stress in the bent part. Then, the two locking members drive the first bending portion and the second bending portion to move away from each other, so that the first bending portion and the second bending portion move away from each other, thereby pushing or pulling the first bending portion and the second bending portion back to their initial positions. This process helps to reduce residual stress at the connection between the first and second bends and the body, thereby maintaining the shape of the bent part and suppressing its springback. Therefore, the springback suppression mechanism provided in this application does not require the alternating use of multiple sets of molds, which simplifies the production process, reduces mold wear and maintenance frequency, and helps to reduce overall costs.

[0006] A springback suppression mechanism is provided for suppressing the springback of a bent component. The bent component includes a body and a first bent portion and a second bent portion connecting the body. The first bent portion and the second bent portion extend perpendicularly to the body in the same direction. The springback suppression mechanism includes two symmetrically arranged push-pull modules. Each push-pull module includes a push-pull mechanism, which includes a gear, a rack, and a locking member. The rack meshes with the gear and has a guide groove. The guide groove includes a first portion and a second portion communicating with the first portion. The extension direction of the first portion is different from that of the second portion. The locking member is movably connected to the rack and includes a locking plate and a guide post disposed on the locking plate. The locking plate has a through hole and a locking groove. The guide post passes through the through hole and is movably inserted into the guide groove. The locking groove is configured to lock the first bent portion and the second bent portion.

[0007] In some possible implementations, each of the push-pull modules further includes a linkage mechanism, which includes a push rod and a guide rod coaxially arranged with the push rod. One end of the push rod is connected to one end of the rack, and one end of the guide rod abuts against the end of the rack away from the push rod.

[0008] In some possible implementations, each of the push-pull modules further includes a first mounting plate, a second mounting plate spaced apart from the first mounting plate, a top plate and a bottom plate connected between the first mounting plate and the second mounting plate, the first mounting plate, the second mounting plate, the top plate and the bottom plate together enclosing an assembly space, the rack being disposed in the assembly space, and a portion of the snap-fit ​​plate, a portion of the guide rod and a portion of the top rod being disposed in the assembly space.

[0009] In some possible implementations, the two push-pull modules are symmetrically arranged about a first axis of symmetry, the first portion and the second portion are symmetrically arranged about a second axis of symmetry, and the first axis of symmetry is perpendicular to the second axis of symmetry.

[0010] In some possible implementations, the extension direction of the first portion forms an angle of 105 to 135 degrees with the first axis of symmetry, and the extension direction of the second portion forms an angle of 15 to 45 degrees with the first axis of symmetry.

[0011] In some possible implementations, the rack includes a first rack body and a second rack body, the first rack body and the second rack body being spaced apart to form a receiving groove, the first rack body having one of the guide grooves, the second rack body having another of the guide grooves, a portion of the snap-fit ​​plate being movably disposed in the receiving groove, and the two ends of the guide post being movably inserted into the two guide grooves respectively.

[0012] In some possible implementations, the guide groove of the first rack and the guide groove of the second rack are symmetrically arranged about a third axis of symmetry, which is perpendicular to the first axis of symmetry and the second axis of symmetry.

[0013] In some possible implementations, the through hole extends through the opposite sides of the snap-fit ​​plate along the direction of the third axis of symmetry, and the opening of the snap-fit ​​groove extends toward the direction of the first axis of symmetry.

[0014] In some possible implementations, the push-pull mechanism further includes an elastic element and a pad, the pad being disposed at one end of the guide rod facing the rack, one end of the elastic element abutting against the pad, and the other end abutting against the side of the base plate facing the assembly space.

[0015] A molding apparatus, comprising the springback suppression mechanism as described above. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a stamping device provided in an embodiment of this application.

[0017] Figure 2 This is a schematic diagram of a U-shaped bending member provided in an embodiment of this application.

[0018] Figure 3 This is a schematic diagram of a rebound suppression mechanism provided in an embodiment of this application.

[0019] Figure 4 for Figure 3 A schematic diagram of the rebound suppression mechanism from another angle.

[0020] Figure 5 for Figure 3 A partial exploded view of the rebound suppression mechanism shown.

[0021] Figure 6 for Figure 4 The rebound suppression mechanism shown is a cross-sectional view along line VI-VI.

[0022] Explanation of main component symbols

[0023] Springback suppression mechanism: 100; Push-pull module: 1; Push-pull mechanism: 10; Gear: 11; Rack: 12; Snap-fit ​​component: 13; Snap-fit ​​plate: 131; Through hole: 131a; Snap-fit ​​groove: 131b; Guide post: 132; Linkage mechanism: 20; Assembly component: 30; First mounting plate: 31; Second mounting plate: 32; Top plate: 33; Bottom plate: 34; Assembly space: 35; Top rod: 40; Guide rod: 50; Elastic component: 53; Pad: 54; Guide Slot: 120; First part: 120a; Second part: 120b; First rack body: 121; Second rack body: 122; Receiving slot: 123; Bending part: 300; Body: 301; First bending part: 302; Second bending part: 303; Stamping equipment: 200; Vertical frame: 210; Upper die assembly: 220; Lower die assembly: 230; Feeding mechanism: 240; First axis of symmetry: A; Second axis of symmetry: B; Third axis of symmetry: C. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. In the description of this application, it should be noted that "multiple" means two or more, unless otherwise expressly and specifically limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] Please see Figure 1 and Figure 2 This embodiment provides a stamping apparatus 200 for stamping sheet metal to form a bent part 300 and suppressing the springback of the bent part 300. The bent part 300 has a generally U-shaped cross-section and includes a body 301 and a first bent portion 302 and a second bent portion 303 connected to opposite ends of the body 301. The first bent portion 302 and the second bent portion 303 extend in the same direction and are both perpendicular to the extension direction of the body 301. The extension direction refers to the geometric orientation of each part along its length.

[0027] The stamping equipment 200 includes a vertical frame 210, a lower die assembly 230 supported on the vertical frame 210, an upper die assembly 220 spaced apart from and located above the lower die assembly 230, a feeding mechanism 240 movably disposed between the lower die assembly 230 and the upper die assembly 220, two positioning and clamping mechanisms 250 spaced apart and supported on the lower die assembly 230, and a springback suppression mechanism 100 disposed below the upper die assembly 220. The vertical frame 210 provides rigid support. The upper die assembly 220 reciprocates vertically relative to the lower die assembly 230 under the drive of a drive source. The feeding mechanism 240 feeds sheet metal between the upper die assembly 220 and the lower die assembly 230 according to the production cycle. The positioning and clamping mechanisms 250 limit the sheet metal before stamping.

[0028] During operation, the feeding mechanism 240 conveys the sheet material between the upper mold assembly 220 and the lower mold assembly 230; two positioning and clamping mechanisms 250 respectively abut against the opposite sides of the sheet material to limit its position; then, the upper mold assembly 220 presses down and cooperates with the lower mold assembly 230 to complete the forming of the bent part 300; next, the springback suppression mechanism 100 simultaneously applies opposing or opposing directions to the first bending portion 302 and the second bending portion 303 of the bent part 300 until the bent part 300 does not spring back.

[0029] In other embodiments of this application, the stamping equipment 200 may also be other forming equipment with springback suppression requirements, such as a thermoforming press, hydraulic forming machine, bending machine, stretch forming machine, roll forming equipment, servo punch press, or electromagnetic forming equipment. The bent part 300 may also be a Z-shaped bent part, a cap-shaped part, a channel steel, etc.

[0030] Please refer to Figures 3 to 6 The springback suppression mechanism 100 includes two push-pull modules 1, which are symmetrically arranged about a first axis of symmetry A. That is, each push-pull module 1 is identical in structural dimensions and functional principle, but they are mirror-symmetrical about the first axis of symmetry A in terms of spatial installation position and direction of movement. Specifically, the two push-pull modules 1 are symmetrically arranged on both sides of the bent member 300. When one push-pull module 1 performs a pushing action on the bent member 300, the other push-pull module 1 simultaneously performs a reverse stretching action on the bent member 300.

[0031] Each push-pull module 1 includes a push-pull mechanism 10, a linkage mechanism 20 connecting the push-pull mechanism 10, and an assembly 30 for assembling the push-pull mechanism 10 and the linkage mechanism 20. The linkage mechanism 20 is connected to the upper mold assembly 220 (see [link]). Figure 1(The same applies below). During the reciprocating movement of the upper mold assembly 220, the push-pull mechanism 10 is driven to reciprocate both vertically and horizontally via the linkage mechanism 20. Specifically, one push-pull mechanism 10 drives the first bent portion 302 to reciprocate both vertically and horizontally, while the other push-pull mechanism 10 drives the second bent portion 303 to reciprocate both vertically and horizontally. In the vertical direction, the two push-pull mechanisms 10 move in the same direction, while in the horizontal direction, they move in opposite directions. The direction of the vertical reciprocating movement is parallel to the first axis of symmetry A, and the direction of the horizontal reciprocating movement is perpendicular to the first axis of symmetry A.

[0032] Each push-pull mechanism 10 includes a gear 11, a rack 12 meshing with the gear 11, and a snap-fit ​​member 13 movably connected to the rack 12. The gear 11 is connected to a drive source (e.g., a motor) of the upper mold assembly 220, and the rack 12 is disposed within the assembly 30 along the direction of the first axis of symmetry A. One rack 12 is provided with a "<"-shaped guide groove 120, and one end of the snap-fit ​​member 13 is movably disposed in the "<"-shaped guide groove 120, while the other end is connected to the first bend 302. Another rack 12 is provided with a ">"-shaped guide groove 120, and one end of the other snap-fit ​​member 13 is movably disposed in the ">"-shaped guide groove 120, while the other end is connected to the second bend 303.

[0033] Each linkage mechanism 20 includes a push rod 40 and a guide rod 50 coaxially arranged with the push rod 40. One end of the push rod 40 is connected to one end of the rack 12, and the other end extends out of the assembly 30. One end of the guide rod 50 abuts against the end of the rack 12 opposite to the push rod 40, and the other end extends out of the assembly 30. The other end of the push rod 40 is used to connect to the upper mold assembly 220, and one end of the guide rod 50 is used to abut against the lower mold assembly 230.

[0034] Each assembly 30 includes a first mounting plate 31, a second mounting plate 32 spaced apart from the first mounting plate 31, a top plate 33 and a bottom plate 34 connected between the first mounting plate 31 and the second mounting plate 32. The top plate 33 and the bottom plate 34 are arranged parallel to each other. Thus, the first mounting plate 31, the second mounting plate 32, the top plate 33 and the bottom plate 34 together enclose an assembly space 35. The rack 12 is movably disposed within the assembly space 35 along the direction of the first axis of symmetry A. One end of the push rod 40 movably passes through the top plate 33 to enter the assembly space 35, and one end of the guide rod 50 movably passes through the bottom plate 34 to enter the assembly space 35.

[0035] When the aforementioned springback suppression mechanism 100 is in use, the drive source of the upper mold assembly 220 drives the gear 11 to rotate, and both racks 12 move up and down along the direction of the first axis of symmetry A. Since the guide grooves 120 of the two racks 12 are mirror-symmetrical, the two locking members 13 move up and down with the racks 12, and also move left and right in opposite directions, thereby causing the first bent portion 302 and the second bent portion 303 to bend in opposite directions. For example, firstly, the two locking members 13 drive the first bent portion 302 and the second bent portion 303 to move towards each other, so that the first bent portion 302 and the second bent portion 303 move closer to each other from the initial position, thereby introducing reverse stress in the bent member 300. Then, the two locking members 13 drive the first bent portion 302 and the second bent portion 303 to move away from each other, so that the first bent portion 302 and the second bent portion 303 move away from each other, thereby pushing and pulling the first bent portion 302 and the second bent portion 303 back to the initial position. This process helps to reduce the residual stress at the connection between the first bend 302 and the second bend 303 and the body 301, thereby maintaining the shape of the bent part 300 and suppressing the springback of the bent part 300. At the same time, the end of the push rod 40 extending out of the assembly space 35 abuts against the upper mold assembly 220, and the end of the guide rod 50 extending out of the assembly space 35 abuts against the lower mold assembly 230, thereby providing guidance for the movement of the rack 12 and the snap-fit ​​member 13.

[0036] Please see Figure 4 , Figure 5 as well as Figure 6 In this embodiment, the guide groove 120 includes a first portion 120a and a second portion 120b communicating with the first portion 120a. The extending directions of the first portion 120a and the second portion 120b are different. The first portion 120a and the second portion 120b are symmetrical about a second axis of symmetry B, which is perpendicular to the first axis of symmetry A. Specifically, the extending direction of the first portion 120a forms an angle of 105 to 135 degrees with the first axis of symmetry A, and the extending direction of the second portion 120b forms an angle of 15 to 45 degrees with the first axis of symmetry A.

[0037] In this embodiment, the rack 12 includes a first rack body 121 and a second rack body 122. The first rack body 121 and the second rack body 122 are spaced apart to form a receiving groove 123. The first rack body 121 is provided with a guide groove 120. Figure 5 (Not shown), the second rack body 122 is provided with another guide groove 120. The two guide grooves 120 are symmetrical about a third axis of symmetry C. The third axis of symmetry C is perpendicular to the second axis of symmetry B and the first axis of symmetry A, respectively.

[0038] The snap-fit ​​component 13 includes a snap-fit ​​plate 131 and a guide post 132 disposed on the snap-fit ​​plate 131. One end of the snap-fit ​​plate 131 has a through hole 131a, and the other end has a snap-fit ​​groove 131b. The guide post 132 passes through the through hole 131a. Specifically, the through hole 131a extends through opposite sides of the snap-fit ​​plate 131 along the direction of the second axis of symmetry B. Both ends of the guide post 132 are respectively inserted into two guide grooves 120. The snap-fit ​​groove 131b extends towards the direction of the first axis of symmetry A. The end of the first bent portion 302 away from the body 301 is detachably inserted into the snap-fit ​​groove 131b of one snap-fit ​​plate 131. The end of the second bent portion 303 away from the body 301 is detachably inserted into the snap-fit ​​groove 131b of another snap-fit ​​plate 131. Thus, under the symmetrical drive of the first rack body 121 and the second rack body 122, the snap-fit ​​plate 131 maintains stable up-and-down reciprocating movement and left-and-right reciprocating movement.

[0039] In this embodiment, the push-pull mechanism 10 further includes an elastic element 53 and a pad 54. The pad 54 is located at one end of the guide rod 50 facing the rack 14, and one end of the elastic element 53 abuts against the pad 54, while the other end abuts against the side of the base plate 34 facing the assembly space 35. During operation, the elastic element 53 is compressed and stores energy as the rack 14 descends, and releases the stored energy when the rack 14 returns to its original position, providing a continuous and stable pull force to the locking plate 131. Specifically, the elastic element 53 is a spring. The pad 54 is a rubber plate.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A springback suppression mechanism for suppressing springback of a bent piece including a body and first and second bent portions connecting the body, the first and second bent portions extending perpendicularly to the body and in the same direction, characterized by, The rebound suppression mechanism includes two symmetrically arranged push-pull modules, each push-pull module including a push-pull mechanism, the push-pull mechanism including: gear, A rack that meshes with a gear, the rack being provided with a guide groove, the guide groove comprising a first part and a second part communicating with the first part, the extension direction of the first part being different from the extension direction of the second part; A snap-fit ​​component is movably connected to the rack. The snap-fit ​​component includes a snap-fit ​​plate and a guide post disposed on the snap-fit ​​plate. The snap-fit ​​plate has a through hole and a snap-fit ​​groove. The guide post passes through the through hole and is movably inserted into the guide groove. The snap-fit ​​groove is configured to snap the first bend and the second bend.

2. The recoil suppression mechanism of claim 1, wherein Each of the push-pull modules further includes a linkage mechanism, which includes a push rod and a guide rod coaxially arranged with the push rod. One end of the push rod is connected to one end of the rack, and one end of the guide rod abuts against the end of the rack away from the push rod.

3. The recoil suppression mechanism of claim 2, wherein, Each push-pull module further includes an assembly, on which the push-pull mechanism and the linkage mechanism are assembled. The assembly includes a first mounting plate, a second mounting plate spaced apart from the first mounting plate, a top plate and a bottom plate connected between the first mounting plate and the second mounting plate. The first mounting plate, the second mounting plate, the top plate and the bottom plate together enclose an assembly space. The rack is disposed in the assembly space. Part of the snap-fit ​​plate, part of the guide rod and part of the top rod are disposed in the assembly space.

4. The recoil suppression mechanism of claim 3, wherein The two push-pull modules are symmetrically arranged about a first axis of symmetry, and the first part and the second part are symmetrically arranged about a second axis of symmetry, with the first axis of symmetry perpendicular to the second axis of symmetry.

5. The recoil suppression mechanism of claim 4, wherein, The extension direction of the first part forms an angle of 105 to 135 degrees with the first axis of symmetry, and the extension direction of the second part forms an angle of 15 to 45 degrees with the first axis of symmetry.

6. The recoil suppression mechanism of claim 4, wherein The rack includes a first rack body and a second rack body, which are spaced apart to form a receiving groove. The first rack body has one guide groove, and the second rack body has another guide groove. Part of the snap-fit ​​plate is movably disposed in the receiving groove, and the two ends of the guide post are respectively movably inserted into the two guide grooves.

7. The recoil suppression mechanism of claim 6, wherein The guide groove of the first rack and the guide groove of the second rack are symmetrically arranged about a third axis of symmetry, which is perpendicular to the first axis of symmetry and the second axis of symmetry.

8. The recoil suppression mechanism of claim 7, wherein, The through hole extends through the opposite sides of the snap-fit ​​plate along the direction of the third axis of symmetry, and the opening of the snap-fit ​​groove extends toward the direction of the first axis of symmetry.

9. The recoil suppression mechanism of claim 4, wherein, The push-pull mechanism also includes an elastic element and a pad. The pad is located at one end of the guide rod facing the rack. One end of the elastic element abuts against the pad, and the other end abuts against the side of the base plate facing the assembly space.

10. A molding apparatus characterized by comprising: Includes the rebound suppression mechanism as described in any one of claims 1 to 9.

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