Anti-deformation metal sheet stamping positioning structure

Abstract

This utility model relates to the field of metal processing technology, and in particular to a positioning structure for stamping anti-deformation thin metal sheets. It includes: two sets of clamping plates, each set of clamping plates being mounted on the side walls of an upper mold and a lower mold respectively via two magnetic structures; a lever is fixedly connected to the magnetic structure on the upper mold; a positioning mechanism is disposed on the lower clamping plate, the positioning mechanism including a mounting base fixed to the side wall of the clamping plate, a sliding opening through the side wall of the mounting base, a push rod slidably connected in the sliding opening, an elastic reset mechanism between the push rod and the mounting base, a slide rail fixedly connected to the top of the mounting base, and symmetrical sliding grooves on the inner wall of the slide rail; through the positioning mechanism on the clamping plate, the downward movement of the upper mold drives the lever to abut against the slide rail, thereby achieving automatic position adjustment of the thin metal sheet through the linkage of the rotating rod, the push rod, and the push plate.

Description

Technical Field

[0001] This utility model relates to the field of metal processing technology, and in particular to a stamping positioning structure for anti-deformation thin metal sheets. Background Technology

[0002] Sheet metal stamping is an important metal processing method widely used in the automotive, home appliance, and instrumentation industries. This process applies external force to sheet metal using a press and dies, causing plastic deformation or separation to obtain workpieces of the desired shape and size. In sheet metal stamping, accurate and reliable positioning of the sheet metal itself is just as crucial as precise positioning of the stamping die. However, commonly used sheet metal thicknesses are typically between 0.5-2 mm. These sheets, due to their low rigidity, are prone to deformation or lateral displacement during feeding, movement, or stamping. Existing positioning methods, such as relying solely on locating pins on the die, often fail to effectively overcome the deformation tendency of the sheet metal, making it impossible to guarantee that the sheet metal remains in a position that meets stamping accuracy requirements. This inaccurate positioning can lead to dimensional deviations in the stamped parts, increased scrap rates, and even die damage. Lateral displacement is more likely to occur when the sheet metal needs to accurately enter the forming groove of the lower die, resulting in undesirable deformation of the sheet metal during stamping.

[0003] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a deformation-resistant metal sheet stamping positioning structure.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a deformation-resistant metal sheet stamping positioning structure, comprising two sets of clamping plates, each set of clamping plates being installed on the side walls of the upper and lower molds respectively through two magnetic structures, with a lever fixedly connected to the magnetic structure on the upper mold; a positioning mechanism, disposed on the lower clamping plate, the positioning mechanism comprising a mounting base, the mounting base being fixed to the side wall of the clamping plate, a sliding opening being provided through the side wall of the mounting base, a push rod being slidably connected in the sliding opening, an elastic reset mechanism being provided between the push rod and the mounting base, a slide rail being fixedly connected to the top of the mounting base, symmetrically provided sliding grooves being provided on the inner wall of the slide rail, a slide rod being provided in both sliding grooves, a rotating rod being provided on the surface of the slide rod, one end of the rotating rod being hinged to the top of the push rod.

[0006] Furthermore, a push plate is fixedly connected to the end of the push rod.

[0007] Furthermore, the elastic reset mechanism includes: a rectangular opening that extends through the top of the push rod; a stop block that is fixedly connected to the inner wall of the sliding opening and inserted into the rectangular opening; and a compression spring that is disposed inside the rectangular opening, with both ends of the compression spring being fixedly connected to the inner wall of the rectangular opening and the side wall of the stop block, respectively. The compression spring is used to push the push rod to move away from the center of the mold when the upper mold moves upward.

[0008] Furthermore, the magnetic attraction structure includes: a housing, fixedly connected to the side wall of the card plate, with a permanent magnet slidably connected laterally inside the housing; and a partition slidably inserted into the housing.

[0009] Furthermore, the permanent magnet has a first inclined surface on its surface, and the partition has a second inclined surface that cooperates with the first inclined surface on its surface.

[0010] Furthermore, the lever is fixedly connected to the housing located above it.

[0011] Furthermore, the rotating rod is rotatably connected to the sliding rod.

[0012] Furthermore, a triangular block is fixedly connected to the bottom surface of the slide, the slide rod abuts against the triangular block, and moves upward along the slide under the drive of the rotating rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] By using a positioning mechanism on the clamping plate, the downward movement of the upper die drives the lever to abut against the slide bar. This, in turn, through the linkage of the rotating rod, push rod, and push plate, achieves automatic position adjustment of the thin metal sheet. This effectively solves the problem in existing technologies where thin sheets are easily deformed during stamping and precise positioning is difficult relying solely on positioning pins. It ensures that the thin metal sheet accurately enters the forming groove of the lower die, avoiding lateral offset and deformation, thereby improving stamping accuracy and product quality. This structure directly utilizes the movement of the stamping die for positioning, eliminating the need for additional electrical control equipment and wiring on the stamping equipment. Therefore, it is simple in structure, easy to use, safe and reliable, and possesses high stability, representing a significant technological advancement and beneficial effect compared to existing technologies. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of the metal sheet stamping positioning structure to prevent deformation.

[0016] Figure 2 A partial structural diagram of a metal sheet stamping positioning structure to prevent deformation.

[0017] Figure 3 A schematic diagram of the installation of compression springs in the stamping positioning structure of a metal sheet to prevent deformation.

[0018] Figure 4 A schematic diagram of the connection between the push rod and push plate in the stamping positioning structure of a metal sheet to prevent deformation.

[0019] Figure 5 A partial cross-sectional view of the housing of a metal sheet stamping positioning structure designed to prevent deformation.

[0020] Figure 6 for Figure 4 A magnified structural diagram of point A in the middle.

[0021] In the diagram: 1. Upper mold; 2. Lower mold; 3. Clamping plate; 4. Lever; 5. Slide rod; 6. Rotating rod; 7. Push rod; 8. Push plate; 9. Compression spring; 10. Triangular block; 11. Slide groove; 12. Housing; 13. Permanent magnet; 14. Partition plate; 15. Carriage; 16. Stop block. Detailed Implementation

[0022] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0023] Metal sheet stamping, as a highly efficient metal processing method, plays an important role in modern manufacturing. However, when stamping metal sheets with a thickness typically between 0.5-2mm, due to the inherent properties of the material, the sheets are prone to deformation during feeding or movement, and relying solely on traditional die positioning pins is insufficient to guarantee positional accuracy. This directly affects the quality of stamped parts and production efficiency. To address this technical problem, this invention proposes a deformation-resistant metal sheet stamping positioning structure. This structure utilizes a positioning mechanism mounted on the die, which is driven by the movement of the upper die to achieve automatic and precise position adjustment of the metal sheet, effectively preventing deformation and displacement of the sheet during the stamping process.

[0024] like Figures 1 to 6 The deformation-resistant metal sheet stamping positioning structure shown includes:

[0025] Two sets of card plates 3 are installed on the side walls of the upper mold 1 and the lower mold 2 respectively through two magnetic structures. A lever 4 is fixedly connected to the magnetic structure on the upper mold 1.

[0026] The positioning mechanism is located on the lower plate 3. The positioning mechanism includes a mounting base, which is fixed to the side wall of the plate 3. A sliding opening is provided through the side wall of the mounting base, and a push rod 7 is slidably connected in the sliding opening. An elastic reset mechanism is provided between the push rod 7 and the mounting base. A slide 15 is fixedly connected to the top of the mounting base. A slide groove 11 is symmetrically provided on the inner wall of the slide 15. A slide rod 5 is provided in both slide grooves 11. A rotating rod 6 is provided on the surface of the slide rod 5. The rotating rod 6 is rotatably connected to the slide rod 5. One end of the rotating rod 6 is hinged to the top of the push rod 7. A push plate 8 is fixedly connected to the end of the push rod 7.

[0027] The working principle of this utility model is as follows: In use, the user first uses the magnetic suction structure to conveniently install the clamping plate 3 on the side walls of the upper mold 1 and the lower mold 2. During the metal sheet stamping, when the upper mold 1 moves downward, the lever 4 fixed on the upper mold 1 also moves downward. When the lever 4 abuts against the slide rod 5 in the positioning mechanism set on the lower clamping plate 3, the downward pressure of the lever 4 drives the slide rod 5 to move downward. The movement of the slide rod 5 is linked by the rotating rod 6, causing the rotating rod 6 to rotate around a certain point (e.g., the connection point on the slide rod 5). The rotation of the rotating rod 6, through its hinge with the push rod 7, drives the push rod 7 to slide along the sliding opening on the mounting base towards the center position of the mold. The end of the push rod 7 is connected to a push plate 8, which moves with the push rod 7, contacts and pushes the metal sheet, and precisely adjusts its position to ensure that the metal sheet is accurately aligned with the forming groove on the lower mold 2. This positioning process is completed before or at the initial stage of contact between the punch on the upper die 1 and the metal sheet, effectively preventing lateral displacement or deformation of the metal sheet due to inaccurate positioning during the stamping process. After the stamping process is completed, the upper die 1 moves upward. At this time, the elastic reset mechanism set on the push rod 7 releases elastic potential energy, pushing the push rod 7 to move away from the center of the die, thereby resetting the rotating rod 6. The reset movement of the rotating rod 6, through its connection with the slide rod 5, causes the slide rod 5 to move upward along the slide groove 11 on the slide 15, ultimately returning the entire positioning mechanism to its initial position, preparing for the next stamping operation. In this process, the components such as the lever 4, slide rod 5, rotating rod 6, push rod 7, push plate 8, elastic reset mechanism, slide 15, and slide groove 11 cooperate with each other to achieve automatic, accurate, and reliable positioning of the metal sheet.

[0028] As one embodiment of this utility model, the elastic reset mechanism includes: a rectangular opening that extends through the top of the push rod 7; a stop block 16 that is fixedly connected to the inner wall of the sliding opening and inserted into the rectangular opening; and a compression spring 9 that is disposed inside the rectangular opening. The two ends of the compression spring 9 are fixedly connected to the inner wall of the rectangular opening and the side wall of the stop block 16, respectively. The compression spring 9 is used to push the push rod 7 to move away from the center of the mold when the upper mold 1 moves upward.

[0029] In implementation, the elastic reset mechanism provides a reset force after the positioning mechanism completes the positioning of the metal sheet. When the upper mold 1 moves upward, it allows the push rod 7 to automatically move away from the mold center, thus returning the entire positioning mechanism to its initial position. When the push rod 7 moves towards the mold center under the drive of the lever 4 and the rotating rod 6, the rectangular opening on the push rod 7 moves relative to the stop block 16, compressing the compression spring 9 and storing elastic potential energy. When the upper mold 1 moves upward, and the lever 4 disengages from the slide rod 5, the compression spring 9 releases the stored elastic potential energy, pushing the push rod 7 to slide outward. The stop block 16 acts as a limit and support for the compression spring 9 within the rectangular opening of the push rod 7. Thus, the elastic reset mechanism ensures the automatic reset of the positioning mechanism without manual intervention, improving the automation and efficiency of the stamping operation. Compared to solutions without an elastic reset mechanism, this additional technical feature allows the positioning mechanism to automatically reset when the upper mold rises, greatly simplifying the operation process and improving the practicality and automation level of the equipment.

[0030] As one embodiment of the present invention, the magnetic attraction structure includes: a housing 12, which is fixedly connected to the side wall of the card plate 3, and a permanent magnet 13 is slidably connected to the inside of the housing 12; and a partition 14 slidably inserted into the housing 12; the surface of the permanent magnet 13 is provided with a first inclined surface, and the surface of the partition 14 is provided with a second inclined surface that cooperates with the first inclined surface.

[0031] In practice, this magnetic structure is designed to provide a controllable magnetic force, allowing the card plate 3 to be easily attached to the mold and removed when needed. When the card plate 3 needs to be installed, the partition 14 is pulled out of the housing 12. Under the action of magnetic force, the permanent magnet 13 slides towards the mold and tightly adheres to the mold surface, thus firmly fixing the card plate 3 to the mold. When the card plate 3 needs to be removed, the partition 14 is pressed down. The partition 14 first moves the permanent magnet 13 away from the mold, weakening the magnetic force. Simultaneously, the partition 14 inserts between the permanent magnet 13 and the mold, further blocking the magnetic lines of force and further weakening the magnetic strength. In this way, the magnetic force is significantly reduced, allowing the user to remove the card plate 3 from the mold more easily. Compared to a simple fixed magnet, this magnetic structure with a partition provides adjustable magnetic force, greatly improving the convenience of installation and removal and avoiding the operational difficulties caused by strong magnetic forces.

[0032] By setting up a first and second inclined plane that cooperate with each other, the vertical movement of the partition 14 can be more effectively converted into a force that pushes the permanent magnet 13 horizontally. This inclined plane design allows the user to push the permanent magnet 13 away from the mold surface with less effort when pressing the partition 14 downwards, thereby smoothing the reduction of the magnetic attraction force and facilitating the removal of the clamping plate 3. This additional technical feature optimizes the control method of the magnetic attraction structure and improves the convenience and reliability of operation.

[0033] In one embodiment of this utility model, the lever 4 is fixedly connected to the housing 12 located above.

[0034] In implementation, by fixing the lever 4 to the housing 12 of the upper magnetic structure, it is ensured that the lever 4 can move downward synchronously with the downward movement of the upper mold 1. Since the magnetic structure itself is firmly attached to the upper mold 1, the movement trajectory and stroke of the lever 4 precisely correspond to the movement of the upper mold 1. This ensures that the lever 4 can reliably abut against the lower slide bar 5 and drive the entire positioning mechanism to operate according to a predetermined timing and stroke. This additional technical feature clarifies the installation position of the lever 4, ensuring that it can effectively transmit the movement of the upper mold 1 to the positioning mechanism, and is a key link in realizing the automatic drive of the positioning mechanism.

[0035] As one embodiment of this utility model, a triangular block 10 is fixedly connected to the inner bottom surface of the slide groove 11, the slide rod 5 abuts against the triangular block 10, and moves upward along the slide groove 11 under the drive of the rotating rod 6.

[0036] In practice, the triangular block 10 is a block-shaped structure with an inclined surface. The sliding rod 5 abuts against the inclined surface of the triangular block 10. When the rotating rod 6 is reset by the elastic reset mechanism, it drives the sliding rod 5 to move upward through its connection with the sliding rod 5. Since the sliding rod 5 abuts against the inclined surface of the triangular block 10, its relative position to the triangular block 10 changes as it moves upward, and the sliding rod 5 is guided within the sliding groove 11.

[0037] The cooperation between the triangular block 10 and the slide bar 5, and the movement of the slide bar 5 within the slide groove 11, together constitute the guiding and limiting structure during the resetting process of the positioning mechanism. The inclined surface design of the triangular block 10 can affect the movement trajectory and speed of the slide bar 5 during the resetting process. This structure ensures that the slide bar 5, driven by the rotating rod 6, can move smoothly upward along a predetermined path and eventually return to its initial position. This additional technical feature refines the guiding mechanism during the slide bar resetting process, improving the stability and reliability of the mechanism's movement.

[0038] Working principle of this utility model:

[0039] When in use, the user uses the magnetic structure to fasten the card plate 3 onto the mold body. The internal structure and working principle of the magnetic structure located on the upper mold 1 and the lower mold 2 are the same, only the size is different.

[0040] When stamping sheet metal, as the upper die 1 moves downward, the lever 4 moves downward with the upper die 1. After the lever 4 abuts against the slide bar 5, it drives the rotating rod 6 to rotate around the slide bar 5. The push rod 7, which is rotatably connected to the rotating rod 6, moves towards the center of the die under the drive of the rotating rod 6. At this time, it can drive the push plate 8 to adjust the position of the sheet metal, ensuring that the position of the sheet metal meets the stamping requirements. Furthermore, after the punch on the upper die 1 abuts against the sheet metal, it prevents the sheet metal from shifting laterally and failing to accurately enter the forming groove on the lower die 2, thus preventing the sheet metal from deforming during the stamping process.

[0041] After the stamping process is completed, the upper mold 1 moves upward. At this time, the elastic potential energy of the compression spring 9 is converted into kinetic energy, which drives the push rod 7 to move away from the center of the mold. At this time, the slide rod 5 also moves upward after it comes into contact with the triangular block 10. Then, the slide rod 5 moves upward along the slide groove 11 under the drive of the rotating rod 6. At this time, the rotating rod 6 also rotates to the tilted state, which finally makes the entire positioning structure return to the initial position. At the same time, the metal sheet is fed into the machine, and then it can be used for the next stamping operation. In the positioning mechanism, the movement of the upper mold 1 drives the push rod 7 and the push plate 8 to adjust the position of the metal sheet. No additional electrical control equipment is required, and no wiring is required on the stamping equipment. The structure is simple and easy to use, and the structure is safe and reliable with high stability.

[0042] Its magnetic attraction structure includes a housing 12 and a permanent magnet 13 slidably connected to the housing 12. A partition 14 is also slidably inserted on the housing 12. After the partition 14 is pulled out upward, the permanent magnet 13 slides towards the mold and uses magnetic force to firmly attract the card plate 3 to the mold. When it is necessary to remove the magnetic attraction structure, the partition 14 is pressed down. First, the partition 14 drives the permanent magnet 13 to move away from the mold. Then, the partition 14 is stuck between the permanent magnet 13 and the mold. The two methods simultaneously reduce the magnetic attraction strength of the permanent magnet 13 to the mold. At this time, the magnetic attraction force of the magnetic attraction component on the mold body is small, and the user can easily remove the card plate 3 from the mold.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection claimed by this utility model, which is defined by the appended claims and their equivalents.

Claims

1. A deformation-resistant metal sheet stamping positioning structure, characterized in that, include: Two sets of card plates (3) are installed on the side walls of the upper mold (1) and the lower mold (2) respectively through two magnetic structures. A lever (4) is fixedly connected to the magnetic structure on the upper mold (1). The positioning mechanism is set on the card plate (3) located below. The positioning mechanism includes a mounting base, which is fixed on the side wall of the card plate (3). A sliding opening is provided through the side wall of the mounting base. A push rod (7) is slidably connected in the sliding opening. An elastic reset mechanism is provided between the push rod (7) and the mounting base. A slide (15) is fixedly connected to the top of the mounting base. A sliding groove (11) is symmetrically opened on the inner wall of the slide (15). A slide rod (5) is provided in both of the sliding grooves (11). A rotating rod (6) is provided on the surface of the slide rod (5). One end of the rotating rod (6) is hinged to the top of the push rod (7).

2. The anti-deformation metal sheet stamping positioning structure according to claim 1, characterized in that, The end of the push rod (7) is fixedly connected to a push plate (8).

3. The anti-deformation metal sheet stamping positioning structure according to claim 1, characterized in that, The elastic reset mechanism includes: A rectangular opening extends through the top of the push rod (7); A stop block (16) is fixedly connected to the inner wall of the sliding opening, and the stop block (16) is inserted into the rectangular opening; A compression spring (9) is set inside the rectangular opening. The two ends of the compression spring (9) are fixedly connected to the inner wall of the rectangular opening and the side wall of the stop block (16), respectively. The compression spring (9) is used to push the push rod (7) to move away from the center of the mold when the upper mold (1) moves upward.

4. The anti-deformation metal sheet stamping positioning structure according to claim 1, characterized in that, The magnetic attraction structure includes: a housing (12) fixedly connected to the side wall of the card plate (3), and a permanent magnet (13) slidably connected to the inside of the housing (12); and a partition (14) slidably inserted into the housing (12).

5. The anti-deformation metal sheet stamping positioning structure according to claim 4, characterized in that, The permanent magnet (13) has a first inclined surface on its surface, and the partition plate (14) has a second inclined surface that cooperates with the first inclined surface on its surface.

6. The anti-deformation metal sheet stamping positioning structure according to claim 4, characterized in that, The lever (4) is fixedly connected to the housing (12) located above.

7. The anti-deformation metal sheet stamping positioning structure according to claim 1, characterized in that, The rotating rod (6) is rotatably connected to the sliding rod (5).

8. The anti-deformation metal sheet stamping positioning structure according to claim 1, characterized in that, A triangular block (10) is fixedly connected to the inner bottom surface of the slide groove (11). The slide rod (5) abuts against the triangular block (10) and moves upward along the slide groove (11) under the drive of the rotating rod (6).

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