A flexible stamping die and a flexible stamping method

Abstract

This invention relates to the technical field of molds, and provides a flexible stamping mold and a flexible stamping method, comprising: an upper mold base, a lower mold base, a stamping mechanism, and an elastic unloading and pressing mechanism; a first processing position for placing a metal sheet is provided between the lower mold base and the upper mold base; the upper mold base is capable of opening and closing relative to the lower mold base along a predetermined straight extension direction under the action of an external force; the elastic unloading and pressing mechanism comprises: an unloading plate and an elastic element; the unloading plate is disposed on the side of the upper mold base near the lower mold base, and the elastic element is disposed between the upper mold base and the unloading plate; during the process of the upper mold base closing towards the lower mold base, the unloading plate contacts the metal sheet located at the first processing position before the stamping mechanism, and the elastic element is compressed and generates a restoring elastic force so that the unloading plate applies an elastic pressing force to the metal sheet.

Description

Technical Field

[0001] This invention belongs to the technical field of molds, and more specifically, relates to a flexible stamping mold and a flexible stamping method. Background Technology

[0002] In existing sheet metal stamping processes, punching, bending, or forming operations are typically performed using a combination of upper and lower punches and dies. Specifically, the punch is mounted on an upper die holder. After the metal sheet is conveyed to the processing position above the die, the upper die holder, under the action of a press or other external driving mechanism, moves the punch downwards, bringing it closer to the die. The punch and die then work together to stamp the metal sheet. This type of structure is widely used in the forming of thin sheet metal parts due to its simple composition and high processing efficiency. However, in actual stamping processes, when the punch begins to contact the metal sheet and continues to apply downward pressure, the metal sheet is subjected to a combination of forces, including stamping force, friction, and material deformation reaction force. During the stamping and deformation process, the metal sheet is prone to displacement. Summary of the Invention

[0003] The purpose of this invention is to provide a flexible stamping die to solve the technical problem in the prior art that metal sheets are prone to displacement during the stamping and deformation process.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a flexible stamping die is provided, comprising: an upper die base, a lower die base, a stamping mechanism, and an elastic unloading and pressing mechanism; a first processing position for placing a metal sheet is provided between the lower die base and the upper die base; The upper die holder can open and close relative to the lower die holder along the extension direction of a predetermined straight line under the action of external force; the stamping mechanism is used to stamp the metal sheet that is fed to the first processing position along the feeding direction when the upper die holder and the lower die holder are closed relative to each other; The elastic unloading and pressing mechanism includes: an unloading plate and an elastic element; the unloading plate is slidably disposed on the upper mold base along the extension direction of the predetermined straight line; the unloading plate is disposed on the side of the upper mold base near the lower mold base, and the elastic element is disposed between the upper mold base and the unloading plate; During the process of the upper die holder closing towards the lower die holder, the stripper plate contacts the metal sheet located at the first processing position before the stamping mechanism. The elastic element is compressed and generates a restoring elastic force so that the stripper plate applies an elastic pressing force to the metal sheet.

[0005] Furthermore, the stamping mechanism includes: a first punch and a first die; The first punch is disposed on the upper die holder; the first die is disposed on the lower die holder; when the upper die holder closes toward the lower die holder, the upper die holder drives the first punch to move toward the first die holder to perform stamping processing on the metal sheet located at the first processing position.

[0006] Furthermore, there are two first processing positions, which are arranged sequentially along the feeding direction; there are two first punches and two first dies; the two first punches, the two first dies, and the two first processing positions correspond one-to-one.

[0007] Furthermore, the first punch and the first die located upstream along the feeding direction cooperate to form a first stamping structure; the first stamping structure is set corresponding to the first processing position located upstream; the first stamping structure is used to stamp the metal sheet entering the first processing position located upstream; the stamping object of the first stamping structure is a first area in the predetermined processing area of ​​the metal sheet; The first punch and the first die located downstream along the feeding direction cooperate to form a second stamping structure; the second stamping structure is set corresponding to the first processing position located downstream; the second stamping structure is used to stamp the metal sheet entering the first processing position located downstream; the stamping object of the second stamping structure is a second area in the predetermined processing area of ​​the metal sheet.

[0008] Furthermore, the stamping mechanism further includes: a second punch and a second die; a second processing position for placing a metal sheet is provided between the lower die holder and the upper die holder; in the feeding direction, the second processing position is located downstream of the two first processing positions; The second punch is disposed on the upper die holder; the second die is disposed on the lower die holder; when the upper die holder closes to the lower die holder, the upper die holder drives the second punch to move toward the second die holder to perform stamping processing on the metal sheet located at the second processing position; The second punch and the second die cooperate to form a third stamping structure; the third stamping structure is used to stamp the metal sheet that enters the second processing position; the stamping object of the third stamping structure is the third region in the predetermined processing area of ​​the metal sheet.

[0009] Furthermore, when the first stamping structure stamps the first region in the predetermined processing area, the first stamping structure removes the metal material from the first region; When the second stamping structure stamps the second region in the predetermined processing area, the second stamping structure removes the metal material from the second region; When the third stamping structure stamps the third region in the predetermined processing area, the third stamping structure bends and shapes the third region.

[0010] Furthermore, it also includes: a sliding rod, a fixing plate, and a limiting member; the fixing plate is disposed on the upper mold base, and the fixing plate is located between the upper mold base and the lower mold base; the fixing plate has a sliding hole, and the sliding rod is inserted into the sliding hole and can slide along the sliding hole; The sliding hole extends along the direction of the predetermined straight line; one end of the sliding rod is fixedly connected to the limiting member, and the other end of the sliding rod is fixedly connected to the unloading plate; in the radial direction of the sliding hole, the width of the limiting member and the width of the unloading plate are both greater than the width of the sliding hole; the sliding hole is located between the limiting member and the unloading plate; the elastic member is sleeved on the sliding rod.

[0011] Furthermore, it also includes: a positioning pin and a positioning hole; the positioning pin is disposed on the first die cavity; The positioning pin is used to engage with the edge of the metal sheet to limit the offset of the metal sheet in the feeding direction and / or perpendicular to the feeding direction; The positioning hole is formed on the unloading plate; when the upper mold base and the lower mold base are closed together, the positioning pin can be inserted into the positioning hole.

[0012] Furthermore, it also includes: unloading bars; The lower mold base has a positioning cavity on its surface facing the upper mold base; the second mold cavity is fixed to one end of the stripper bar, and the other end of the stripper bar is inserted into the positioning cavity.

[0013] The present invention also provides a flexible stamping method using the aforementioned flexible stamping die, comprising the following steps: Step S1: Convey the metal sheet along the feeding direction to the first processing position between the upper die holder and the lower die holder; Step S2: Drive the upper mold base to close relative to the lower mold base along the extension direction of a predetermined straight line towards the lower mold base; Step S3: During the closing process of the upper die base, the stripper plate contacts the metal sheet located at the first processing position before the stamping mechanism; Step S4: Continue to drive the upper die holder to close towards the lower die holder, causing the elastic member disposed between the upper die holder and the stripper plate to undergo elastic deformation, and applying an elastic pressing force to the metal sheet through the stripper plate; perform stamping processing on the metal sheet located at the first processing position through the stamping mechanism.

[0014] The beneficial effects of the flexible stamping die provided by this invention are as follows: Compared with the prior art, the flexible stamping die provided by this invention allows the upper die holder to open and close relative to the lower die holder along the extension direction of a predetermined straight line F under the action of external force, that is, the upper die holder can move closer to or further away from the lower die holder along the extension direction of the predetermined straight line F; the stamping mechanism can perform stamping processing on the metal sheet in the first processing position when the upper and lower die holders are closed together; there is a first processing position between the upper and lower die holders, and the metal sheet can be conveyed to the first processing position along the feeding direction H; when the metal sheet is placed in the first processing position, the stamping mechanism can stamp the metal sheet in the first processing position; the elastic unloading and pressing mechanism includes an unloading plate and The elastic element and the stripper plate slide along the extension direction of a predetermined straight line F on the upper die holder, with the stripper plate positioned on the side of the upper die holder closer to the lower die holder. The elastic element is positioned between the upper die holder and the stripper plate. When the upper die holder moves toward the lower die holder, the stripper plate can contact the metal sheet in the first processing position before the stamping mechanism. As the upper die holder continues to move toward the lower die holder, the elastic element undergoes elastic deformation, and the stripper plate can apply elastic pressure to the metal sheet through the elastic element, so that the metal sheet is pressed into the first processing position. At this time, the stamping mechanism performs stamping processing on the metal sheet. The metal sheet is not easily slipped, lifted, or offset relative to the lower die holder under the action of stamping force, friction, or material deformation reaction force, which facilitates the metal sheet being held in the first processing position. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the flexible stamping die and the metal sheet provided in an embodiment of the present invention; Figure 2 This is a front view schematic diagram of the flexible stamping die and metal sheet cooperation provided in an embodiment of the present invention; Figure 3 This is a top view schematic diagram of the flexible stamping die and metal sheet cooperation provided in an embodiment of the present invention; Figure 4 for Figure 3 Sectional view of AA; Figure 5 This is a three-dimensional assembly diagram of the first concave mold provided in an embodiment of the present invention; Figure 6 A three-dimensional schematic diagram of the first concave mold and the metal sheet in cooperation according to an embodiment of the present invention; Figure 7 A three-dimensional schematic diagram of the assembly of the unloading plate (with the elastic element hidden) provided in an embodiment of the present invention; Figure 8 A perspective view of the assembly of the first punch and the second punch (concealing the stripper plate and the elastic element) provided for an embodiment of the present invention; Figure 9 This is a schematic diagram illustrating the cooperation between the fixing plate and the sliding rod provided in an embodiment of the present invention; Figure 10This is a three-dimensional schematic diagram of the cooperation between the unloading plate and the metal sheet provided in an embodiment of the present invention; Figure 11 for Figure 10 Enlarged view of point B in the middle; Figure 12 A three-dimensional schematic diagram of a metal sheet provided in an embodiment of the present invention; Figure 13 for Figure 12 Enlarged diagram of point C in the middle.

[0016] The following are the labeling elements in the figure: 11-Lower die base; 111-Positioning cavity; 12-Upper die base; 2-Punching mechanism; 21-First punch; 22-First die cavity; 23-Second punch; 24-Second die cavity; 3-Elastic unloading and pressing mechanism; 31-Unloading plate; 311-Positioning hole; 32-Elastic element; 33-Slide rod; 34-Limiting element; 35-Fixing plate; 351-Slide hole; 4-Metal sheet; 41-First area; 42-Second area; 43-Third area; 51-Positioning pin; 52-Unloading strip; 53-Backing plate; 54-Die handle; 551-Guide rod; 552-Sleeve; F-Predetermined straight line; H-Feeding direction. Detailed Implementation

[0017] It should be noted that the specific embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0018] It should be noted that, in the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Here, A and B can be singular or plural, respectively.

[0019] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" or "attached to" another component, it can be directly connected to or indirectly connected to that other component. When a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component.

[0020] It should be noted that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0021] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0022] It should be noted that the term "two" means two or more, unless otherwise explicitly specified.

[0023] Please refer to the following: Figures 1 to 7 The flexible stamping die provided by the present invention will now be described. The flexible stamping die includes: an upper die holder 12, a lower die holder 11, a stamping mechanism 2, and an elastic unloading and pressing mechanism 3; a first processing position for placing a metal sheet 4 is provided between the lower die holder 11 and the upper die holder 12; the upper die holder 12 can open and close relative to the lower die holder 11 along the extension direction of a predetermined straight line F under the action of an external force; the stamping mechanism 2 is used to stamp the metal sheet 4, which is conveyed to the first processing position along the feeding direction H, when the upper die holder 12 and the lower die holder 11 are relatively closed; the elastic unloading and pressing mechanism 3 includes: unloading... The stripper plate 31 and the elastic element 32; the stripper plate 31 is slidably or indirectly on the upper die base 12 along the extension direction of the predetermined straight line F; the stripper plate 31 is disposed on the side of the upper die base 12 near the lower die base 11, and the elastic element 32 is disposed between the upper die base 12 and the stripper plate 31; during the process of the upper die base 12 closing to the lower die base 11, the stripper plate 31 contacts the metal sheet 4 located at the first processing position before the stamping mechanism 2, and the elastic element 32 is compressed and generates a restoring elastic force so that the stripper plate 31 applies an elastic pressing force to the metal sheet 4.

[0024] Thus, the upper die holder 12 can open and close relative to the lower die holder 11 along the extension direction of a predetermined straight line F under the action of external force, that is, the upper die holder 12 can move closer to or further away from the lower die holder 11 along the extension direction of the predetermined straight line F; the stamping mechanism 2 can perform stamping processing on the metal sheet 4 in the first processing position when the upper die holder 12 and the lower die holder 11 are closed together; there is a first processing position between the upper die holder 12 and the lower die holder 11, and the metal sheet 4 can be conveyed to the first processing position along the feeding direction H. When the metal sheet 4 is placed in the first processing position, the stamping mechanism 2 can stamp the metal sheet 4 in the first processing position; the elastic unloading and pressing mechanism 3 includes an unloading plate 31 and an elastic element 32, and the unloading plate 31 is slidably disposed on the upper die holder 11 along the extension direction of the predetermined straight line F. 2. The stripper plate 31 is located on the side of the upper die holder 12 near the lower die holder 11, and the elastic element 32 is located between the upper die holder 12 and the stripper plate 31. When the upper die holder 12 moves toward the lower die holder 11, the stripper plate 31 can contact the metal sheet 4 in the first processing position before the stamping mechanism 2. When the upper die holder 12 continues to move toward the lower die holder 11, the elastic element 32 undergoes elastic deformation, and the stripper plate 31 can apply elastic pressure to the metal sheet 4 through the elastic element 32, so that the metal sheet 4 is pressed in the first processing position. At this time, the stamping mechanism 2 performs stamping processing on the metal sheet 4. The metal sheet 4 is not easy to slide, lift or deviate relative to the lower die holder 11 under the action of stamping force, friction force or material deformation reaction force, so that the metal sheet 4 is kept in the first processing position.

[0025] In one embodiment, when the upper die holder 12 returns, the elastic element 32 resets and pushes the stripper plate 31 to move towards the lower die holder 11. During this process, the stripper plate 31 can separate the metal sheet 4 from the first punch 21, preventing the metal sheet 4 from affecting subsequent feeding as it moves upward with the stamping mechanism 2. Thus, the metal sheet 4 can be pressed down before stamping, maintain a stable position during stamping, and separate from the first punch 21 during the return stroke. This facilitates the metal sheet 4 to stably enter the first processing position along the feeding direction H and remain in the first processing position during continuous stamping.

[0026] In one embodiment, the area where the unloading plate 31 presses down on the metal sheet 4 is a fourth region. In one embodiment, the fourth region is separated from the first region 41. In one embodiment, the fourth region is separated from the second region 42. In one embodiment, the fourth region is separated from the third region 43.

[0027] In one embodiment, a guide rod 551 is provided on the lower mold base 11, and the extension direction of the guide rod 551 is parallel to a predetermined straight line F; a sleeve 552 is provided on the upper mold base 12, and the sleeve 552 is fitted onto the guide rod 551; there are two guide rods 551 and two sleeves 552, with one guide rod 551 and two sleeves 552 corresponding one-to-one. Thus, the upper mold base 12 can slide relative to the lower mold base 11 along the guide rod 551.

[0028] In one embodiment, the metal sheet 4 can be conveyed along a conveyor channel. In one embodiment, the metal sheet 4 can be conveyed manually or by a conveyor belt.

[0029] In one embodiment, the conveying channel can be a space or a trough.

[0030] In one embodiment, the first processing station can be a surface or space for placing the metal sheet 4.

[0031] In one embodiment, the lower die holder 11 can be placed on the worktable of the stamping equipment.

[0032] In one embodiment, a pad 53 is sandwiched between the unloading plate 31 and the upper mold base 12 as a buffer.

[0033] In one embodiment, the feeding direction H is set horizontally.

[0034] In one embodiment, the metal sheet 4 is elongated and extends along the feeding direction H.

[0035] In one embodiment, the upper die holder 12 is provided with a die handle 54, and an external stamping device cooperates with the die handle 54 to press the upper die holder 12 down.

[0036] In one embodiment, the stamping mechanism 2 is located between the upper die holder 12 and the lower die holder 11.

[0037] In one embodiment, during the return stroke of the upper die holder 12, the elastic element 32 resets and pushes the stripper plate 31 toward the lower die holder 11 to separate the metal sheet 4 from the first punch 21 and / or the second punch 23.

[0038] In one embodiment, a first region 41, a second region 42, and a third region 43 are sequentially arranged in the feeding direction H.

[0039] In one embodiment, after the stripper plate 31 contacts the metal sheet 4, as the upper die holder 12 continues to close to the lower die holder 11, the compression of the elastic element 32 gradually increases, thereby gradually increasing the elastic pressing force applied by the stripper plate to the metal sheet. Thus, the stripper plate 31 contacts the metal sheet 4 first, and then the elastic element 32 gradually compresses and increases the clamping force. This avoids the metal sheet 4 from sliding, tilting, or shifting due to impact, friction, and material deformation reaction forces at the moment of contact of the stamping mechanism 2, improving stamping position accuracy and continuous feeding stability.

[0040] Further, please refer to Figures 8 to 13As a specific embodiment of the flexible stamping die provided by the present invention, the stamping mechanism 2 includes: a first punch 21 and a first die 22; the first punch 21 is disposed on the upper die base 12; the first die 22 is disposed on the lower die base 11; when the upper die base 12 closes to the lower die base 11, the upper die base 12 drives the first punch 21 to move toward the first die 22 to perform stamping processing on the metal sheet 4 located at the first processing position.

[0041] Thus, when the upper die holder 12 moves toward the lower die holder 11, the upper die holder 12 can drive the first punch 21 to move toward the first die 22, and the metal sheet 4 in the first processing position can complete the stamping process with the cooperation of the first punch 21 and the first die 22; since the first die 22 is set on the lower die holder 11 and corresponds to the first processing position, the metal sheet 4 can be supported by the first die 22 after moving to the first processing position; since the first punch 21 is set on the upper die holder 12, the first punch 21 can move closer to the first die 22 along the extension direction of the predetermined straight line F with the upper die holder 12, so that the stamping direction is consistent with the opening and closing direction of the upper die holder 12 and the lower die holder 11.

[0042] Further, please refer to Figures 8 to 13 As a specific embodiment of the flexible stamping die provided by the present invention, there are two first processing positions, which are arranged sequentially along the feeding direction H; there are two first punches 21 and two first dies 22; the two first punches 21, the two first dies 22 and the two first processing positions correspond one-to-one.

[0043] Thus, when the metal sheet 4 is conveyed along the feeding direction H, it can first enter one of the first processing positions and then enter the other first processing position, and perform stamping processing in each first processing position by the corresponding first punch 21 and first die 22 respectively; since the two first processing positions are set sequentially along the feeding direction H, after the metal sheet 4 completes the stamping in the previous first processing position, it can continue to move along the feeding direction H to the next first processing position, which improves the processing efficiency.

[0044] In one embodiment, the two first punches 21 are arranged in a mirror-symmetrical configuration.

[0045] In one embodiment, the two first processing positions overlap.

[0046] Further, please refer to Figures 1 to 7In a specific embodiment of the flexible stamping die provided by the present invention, a first punch 21 and a first die 22 located upstream along the feeding direction H cooperate to form a first stamping structure; the first stamping structure is set corresponding to a first processing position located upstream; the first stamping structure is used to stamp the metal sheet 4 entering the first processing position located upstream; the stamping object of the first stamping structure is a first region 41 in the predetermined processing area of ​​the metal sheet 4; a second stamping structure is formed by the first punch 21 and the first die 22 located downstream along the feeding direction H; the second stamping structure is set corresponding to a first processing position located downstream; the second stamping structure is used to stamp the metal sheet 4 entering the first processing position located downstream; the stamping object of the second stamping structure is a second region 42 in the predetermined processing area of ​​the metal sheet 4. Thus, the predetermined processing area of ​​the metal sheet 4 can complete the stamping processing of the first region 41 and the second region 42 respectively along the feeding direction H, improving processing efficiency.

[0047] Further, please refer to Figures 1 to 7 As a specific embodiment of the flexible stamping die provided by the present invention, the stamping mechanism 2 further includes: a second punch 23 and a second die 24; a second processing position for placing a metal sheet 4 is provided between the lower die holder 11 and the upper die holder 12; in the feeding direction H, the second processing position is located downstream of the two first processing positions; the second punch 23 is disposed on the upper die holder 12; the second die 24 is disposed on the lower die holder 11; when the upper die holder 12 closes to the lower die holder 11, the upper die holder 12 drives the second punch 23 to move toward the second die 24 to perform stamping processing on the metal sheet 4 located at the second processing position; the second punch 23 and the second die 24 cooperate to form a third stamping structure; the third stamping structure is used to stamp the metal sheet 4 entering the second processing position; the stamping object of the third stamping structure is the third region 43 in the predetermined processing area of ​​the metal sheet 4.

[0048] Thus, the metal sheet 4 enters the first processing position, the first stamping structure stamps the first area 41 in the predetermined processing area, the second stamping structure stamps the second area 42 in the predetermined processing area, and the third stamping structure stamps the third area 43 in the predetermined processing area; that is, the predetermined processing area of ​​the metal sheet 4 can sequentially complete the stamping processing of the first area 41, the second area 42 and the third area 43 along the feeding direction H, effectively dispersing the deformation and stress concentration during the stamping process.

[0049] In one embodiment, the mating area between the second punch 23 and the second die 24 is provided with an edge shaping structure for trimming the edge of the part during the forming process, so as to reduce the burr height and reduce the sharp edge phenomenon.

[0050] In one embodiment, users can reduce positional fluctuations of parts during continuous stamping by controlling the feed pitch, pressure force, and unloading synchronization, thereby improving the consistency of batch production.

[0051] Further, please refer to Figures 1 to 7 As a specific embodiment of the flexible stamping die provided by the present invention, when the first stamping structure stamps the first region 41 in the predetermined processing area, the first stamping structure removes the metal material from the first region 41; when the second stamping structure stamps the second region 42 in the predetermined processing area, the second stamping structure removes the metal material from the second region 42; when the third stamping structure stamps the third region 43 in the predetermined processing area, the third stamping structure bends and shapes the third region 43.

[0052] Thus, when the metal sheet 4 moves along the feeding direction H, the metal material in the first region 41 is removed by the first stamping structure, the metal material in the second region 42 is removed by the second stamping structure, and then the third region 43 is bent and formed by the third stamping structure. The first region 41, the second region 42 and the third region 43 have clear processing divisions, and it is not necessary to complete the removal of metal material and bending and forming at the same processing position at the same time, thereby reducing stress concentration.

[0053] In one embodiment, the first punch 21 has a cutting edge, and the first die 22 has a cutting cavity corresponding to the cutting edge. The cutting edge and the cutting cavity cooperate to remove metal material from the first region 41 or the second region 42. The second punch 23 located downstream along the feeding direction H has a bending forming surface, and the second die 24 located downstream along the feeding direction H has a bending recess corresponding to the bending forming surface. The bending forming surface and the bending recess cooperate to bend and form the third region 43.

[0054] Further, please refer to Figures 1 to 7 As a specific embodiment of the flexible stamping die provided by the present invention, it further includes: a slide rod 33, a fixing plate 35, and a limiting member 34; the fixing plate 35 is disposed on the upper die base 12, and the fixing plate 35 is located between the upper die base 12 and the lower die base 11; a sliding hole 351 is provided on the fixing plate 35, the slide rod 33 is inserted into the sliding hole 351 and can slide along the sliding hole 351; the sliding hole 351 extends along the extension direction of a predetermined straight line F; one end of the slide rod 33 is fixedly connected to the limiting member 34, and the other end of the slide rod 33 is fixedly connected to the stripper plate 31; in the radial direction of the sliding hole 351, the width of the limiting member 34 and the width of the stripper plate 31 are both greater than the width of the sliding hole 351; the sliding hole 351 is located between the limiting member 34 and the stripper plate 31; an elastic member 32 is sleeved on the slide rod 33.

[0055] Thus, through the cooperation of the slide rod 33 and the sliding hole 351, the stripper plate 31 can slide relative to the upper mold base 12 along the extension direction of the predetermined straight line F, so that the stripper plate 31 can move along the direction defined by the sliding hole 351 when the upper mold base 12 moves towards the lower mold base 11 and during the return stroke, making the movement of the stripper plate 31 more stable; since one end of the slide rod 33 is connected to the limiting member 34 and the other end is connected to the stripper plate 31, and the limiting member 34 and the stripper plate 31 are respectively located on both sides of the sliding hole 351, and the width of the limiting member 34 and the stripper plate 31 is greater than the width of the sliding hole 351, the slide rod 33 is not easy to come out of the sliding hole 351, and the stripper plate 31 can be stably held on the upper mold base 12; since the elastic member 32 is sleeved on the slide rod 33, it is convenient to stably transmit the elastic force between the upper mold base 12 and the stripper plate 31.

[0056] In one embodiment, a channel or groove for sliding of the slide rod 33 is provided between the fixed plate 35 and the upper mold base 12.

[0057] In one embodiment, the first punch 21 is detachably fixed to the fixing plate 35.

[0058] In one embodiment, the second punch 23 is detachably fixed to the fixing plate 35.

[0059] In one embodiment, the elastic element 32 is a cylindrical compression spring.

[0060] Further, please refer to Figures 1 to 7 As a specific embodiment of the flexible stamping die provided by the present invention, it further includes: a positioning pin 51 and a positioning hole 311; the positioning pin 51 is disposed on the first die 22; the positioning pin 51 is used to cooperate with the edge of the metal sheet 4 to limit the offset of the metal sheet 4 in the feeding direction H and / or perpendicular to the feeding direction H; the positioning hole 311 is opened on the stripper plate 31; when the upper die holder 12 and the lower die holder 11 are closed together, the positioning pin 51 can be inserted into the positioning hole 311. In this way, when the stamping mechanism 2 performs stamping processing on the metal sheet 4, the metal sheet 4 is not easy to offset along the feeding direction H or perpendicular to the feeding direction H under the restriction of the positioning pin 51, which makes it easy to maintain the relative position stability between the metal sheet 4 and the punch and die; since the positioning hole 311 is opened on the stripper plate 31, and the positioning pin 51 can be inserted into the positioning hole 311 when the upper die holder 12 and the lower die holder 11 are closed, the positioning pin 51 can be stored in the positioning hole 311 in the closed state.

[0061] Further, please refer to Figures 1 to 7As a specific embodiment of the flexible stamping die provided by the present invention, it further includes: a stripper bar 52; a positioning cavity 111 on the surface of the lower die holder 11 facing the upper die holder 12; and a second die 24 fixed to one end of the stripper bar 52, with the other end of the stripper bar 52 inserted into the positioning cavity 111. Thus, the positioning cavity 111 is disposed on the surface of the lower die holder 11 facing the upper die holder 12, the stripper bar 52 can be positioned within the positioning cavity 111, and the second die 24 is disposed on the stripper bar 52, making it easy to replace and transfer along with the stripper bar 52.

[0062] Please see Figures 1 to 7 The present invention also provides a flexible stamping method using a flexible stamping die, comprising the following steps: Step S1: conveying the metal sheet 4 along the feeding direction H to the first processing position between the upper die holder 12 and the lower die holder 11; Step S2: driving the upper die holder 12 to close relative to the lower die holder 11 along the extension direction of a predetermined straight line F; Step S3: during the closing process of the upper die holder 12, the stripper plate 31 contacts the metal sheet 4 located at the first processing position before the stamping mechanism 2; Step S4: continuing to drive the upper die holder 12 to close to the lower die holder 11, causing the elastic member 32 disposed between the upper die holder 12 and the stripper plate 31 to undergo elastic deformation, and applying an elastic pressing force to the metal sheet 4 through the stripper plate 31; and performing stamping processing on the metal sheet 4 located at the first processing position through the stamping mechanism 2. Thus, due to the adoption of the aforementioned flexible stamping die, the upper die holder 12 can open and close relative to the lower die holder 11 along the extension direction of a predetermined straight line F under the action of external force, that is, the upper die holder 12 can move closer to or further away from the lower die holder 11 along the extension direction of the predetermined straight line F; the stamping mechanism 2 can perform stamping processing on the metal sheet 4 in the first processing position when the upper die holder 12 and the lower die holder 11 are closed together; there is a first processing position between the upper die holder 12 and the lower die holder 11, and the metal sheet 4 can be conveyed to the first processing position along the feeding direction H. When the metal sheet 4 is placed in the first processing position, the stamping mechanism 2 can stamp the metal sheet 4 in the first processing position; the elastic unloading and pressing mechanism 3 includes an unloading plate 31 and an elastic element 32, the unloading plate 31 is along the extension direction of the predetermined straight line F The stripper plate 31 is slidably mounted on the upper die base 12 and is located on the side of the upper die base 12 close to the lower die base 11. The elastic element 32 is located between the upper die base 12 and the stripper plate 31. When the upper die base 12 moves toward the lower die base 11, the stripper plate 31 can contact the metal sheet 4 in the first processing position before the stamping mechanism 2. When the upper die base 12 continues to move toward the lower die base 11, the elastic element 32 undergoes elastic deformation, and the stripper plate 31 can apply elastic pressure to the metal sheet 4 through the elastic element 32, so that the metal sheet 4 is pressed in the first processing position. At this time, the stamping mechanism 2 performs stamping processing on the metal sheet 4. The metal sheet 4 is not easy to slide, lift or deviate relative to the lower die base 11 under the action of stamping force, friction force or material deformation reaction force, so that the metal sheet 4 is kept in the first processing position.

[0063] In one embodiment, after the metal sheet 4 is processed, the bending angle deviation can be controlled within ±0.5°, the surface roughness Ra≤0.8μm, and the edge burr height≤0.02mm, thus taking into account both the flexibility of production and the stability of quality.

[0064] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A flexible stamping die, characterized in that, include: Upper die holder, lower die holder, stamping mechanism, and flexible unloading and pressing mechanism; A first processing position for placing a metal sheet is provided between the lower mold base and the upper mold base; The upper die holder can open and close relative to the lower die holder along the extension direction of a predetermined straight line under the action of external force; the stamping mechanism is used to stamp the metal sheet that is fed to the first processing position along the feeding direction when the upper die holder and the lower die holder are closed relative to each other; The elastic unloading and pressing mechanism includes: an unloading plate and an elastic element; The stripper plate is slidably mounted on the upper mold base along the extension direction of the predetermined straight line; the stripper plate is disposed on the side of the upper mold base near the lower mold base, and the elastic element is disposed between the upper mold base and the stripper plate; During the process of the upper die holder closing towards the lower die holder, the stripper plate contacts the metal sheet located at the first processing position before the stamping mechanism. The elastic element is compressed and generates a restoring elastic force so that the stripper plate applies an elastic pressing force to the metal sheet.

2. The flexible stamping die as described in claim 1, characterized in that, The stamping mechanism includes: a first punch and a first die; The first punch is disposed on the upper die holder; the first die is disposed on the lower die holder; when the upper die holder closes toward the lower die holder, the upper die holder drives the first punch to move toward the first die holder to perform stamping processing on the metal sheet located at the first processing position.

3. The flexible stamping die as described in claim 2, characterized in that, There are two first processing positions, which are arranged sequentially along the feeding direction; there are two first punches and two first dies; the two first punches, the two first dies, and the two first processing positions correspond one-to-one.

4. The flexible stamping die as described in claim 3, characterized in that, Along the feeding direction, the first punch and the first die located upstream cooperate to form a first stamping structure; the first stamping structure corresponds to the first processing position located upstream; the first stamping structure is used to stamp the metal sheet entering the first processing position located upstream; the stamping object of the first stamping structure is a first area in the predetermined processing area of ​​the metal sheet; Along the feeding direction, the first punch and the first die located downstream cooperate to form a second stamping structure; the second stamping structure corresponds to the first processing position located downstream; the second stamping structure is used to stamp the metal sheet entering the first processing position located downstream; the stamping object of the second stamping structure is a second region in the predetermined processing area of ​​the metal sheet.

5. The flexible stamping die as described in claim 4, characterized in that, The stamping mechanism further includes: a second punch and a second die; a second processing position for placing a metal sheet is provided between the lower die holder and the upper die holder; in the feeding direction, the second processing position is located downstream of the two first processing positions; The second punch is disposed on the upper die holder; the second die is disposed on the lower die holder; when the upper die holder closes to the lower die holder, the upper die holder drives the second punch to move toward the second die holder to perform stamping processing on the metal sheet located at the second processing position; The second punch and the second die cooperate to form a third stamping structure; the third stamping structure is used to stamp the metal sheet that enters the second processing position; the stamping object of the third stamping structure is the third region in the predetermined processing area of ​​the metal sheet.

6. The flexible stamping die as described in claim 5, characterized in that, When the first stamping structure stamps the first area in the predetermined processing area, the first stamping structure removes the metal material from the first area; When the second stamping structure stamps the second region in the predetermined processing area, the second stamping structure removes the metal material from the second region; When the third stamping structure stamps the third region in the predetermined processing area, the third stamping structure bends and shapes the third region.

7. The flexible stamping die as described in claim 4, characterized in that, Also includes: The slide rod, the fixing plate, and the limiting component are provided; the fixing plate is disposed on the upper mold base and is located between the upper mold base and the lower mold base; a sliding hole is provided on the fixing plate, and the slide rod is inserted into the sliding hole and can slide along the sliding hole; The sliding hole extends along the direction of the predetermined straight line; one end of the sliding rod is fixedly connected to the limiting member, and the other end of the sliding rod is fixedly connected to the unloading plate; in the radial direction of the sliding hole, the width of the limiting member and the width of the unloading plate are both greater than the width of the sliding hole; the sliding hole is located between the limiting member and the unloading plate; the elastic member is sleeved on the sliding rod.

8. The flexible stamping die as described in claim 2, characterized in that, Also includes: Positioning pin and positioning hole; the positioning pin is disposed on the first die cavity; The positioning pin is used to engage with the edge of the metal sheet to limit the offset of the metal sheet in the feeding direction and / or perpendicular to the feeding direction; The positioning hole is formed on the unloading plate; when the upper mold base and the lower mold base are closed together, the positioning pin can be inserted into the positioning hole.

9. The flexible stamping die as described in claim 5, characterized in that, Also includes: Unloading bar; The lower mold base has a positioning cavity on its surface facing the upper mold base; the second mold cavity is fixed to one end of the stripper bar, and the other end of the stripper bar is inserted into the positioning cavity.

10. A flexible stamping method using the flexible stamping die according to any one of claims 1 to 9, characterized in that, Includes the following steps: Step S1: Convey the metal sheet along the feeding direction to the first processing position between the upper die holder and the lower die holder; Step S2: Drive the upper mold base to close relative to the lower mold base along the extension direction of a predetermined straight line towards the lower mold base; Step S3: During the closing process of the upper die base, the stripper plate contacts the metal sheet located at the first processing position before the stamping mechanism; Step S4: Continue to drive the upper die holder to close towards the lower die holder, causing the elastic member disposed between the upper die holder and the stripper plate to undergo elastic deformation, and applying an elastic pressing force to the metal sheet through the stripper plate; perform stamping processing on the metal sheet located at the first processing position through the stamping mechanism.

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